@unpublished{GruebelHuberHuembsetal.2021, author = {Gr{\"u}bel, Julia and Huber, Olivier and H{\"u}mbs, Lukas and Klimm, Max and Schmidt, Martin and Schwartz, Alexandra}, title = {Nonconvex Equilibrium Models for Energy Markets: Exploiting Price Information to Determine the Existence of an Equilibrium}, url = {https://opus4.kobv.de/opus4-trr154/389}, pages = {29}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @misc{BeckSchmidt2021, author = {Beck, Yasmine and Schmidt, Martin}, title = {A Gentle and Incomplete Introduction to Bilevel Optimization}, url = {https://opus4.kobv.de/opus4-trr154/392}, pages = {104}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @phdthesis{Plein2021, author = {Plein, Fr{\"a}nk}, title = {When Bilevel Optimization Meets Gas Networks: Feasibility of Bookings in the European Entry-Exit Gas Market. Computational Complexity Results and Bilevel Optimization Approaches}, url = {https://opus4.kobv.de/opus4-trr154/393}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{DeSantisdeVriesSchmidtetal.2021, author = {De Santis, Marianna and de Vries, Sven and Schmidt, Martin and Winkel, Lukas}, title = {A Penalty Branch-and-Bound Method for Mixed-Binary Linear Complementarity Problems}, url = {https://opus4.kobv.de/opus4-trr154/394}, pages = {24}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KrugLeugeringMartinetal.2021, author = {Krug, Richard and Leugering, G{\"u}nter and Martin, Alexander and Schmidt, Martin and Weninger, Dieter}, title = {Time-Domain Decomposition for Optimal Control Problems Governed by Semilinear Hyperbolic Systems with Mixed Two-Point Boundary Conditions}, series = {Control and Cybernetics}, journal = {Control and Cybernetics}, url = {https://opus4.kobv.de/opus4-trr154/399}, pages = {20}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KleinertMannsSchmidtetal.2021, author = {Kleinert, Thomas and Manns, Julian and Schmidt, Martin and Weninger, Dieter}, title = {Presolving Linear Bilevel Optimization Problems}, series = {EURO Journal on Computational Optimization}, journal = {EURO Journal on Computational Optimization}, number = {9}, doi = {10.1016/j.ejco.2021.100020}, url = {https://opus4.kobv.de/opus4-trr154/380}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{EgererGrimmGruebeletal.2021, author = {Egerer, Jonas and Grimm, Veronika and Gr{\"u}bel, Julia and Z{\"o}ttl, Gregor}, title = {Long-run market equilibria in coupled energy sectors: A study of uniqueness}, url = {https://opus4.kobv.de/opus4-trr154/381}, pages = {32}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @phdthesis{Kleinert2021, author = {Kleinert, Thomas}, title = {Algorithms for Mixed-Integer Bilevel Problems with Convex Followers}, url = {https://opus4.kobv.de/opus4-trr154/383}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KrugLeugeringMartinetal.2020, author = {Krug, Richard and Leugering, G{\"u}nter and Martin, Alexander and Schmidt, Martin and Weninger, Dieter}, title = {Time-Domain Decomposition for Optimal Control Problems Governed by Semilinear Hyperbolic Systems}, series = {SIAM Journal on Control and Optimization}, journal = {SIAM Journal on Control and Optimization}, url = {https://opus4.kobv.de/opus4-trr154/359}, pages = {28}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KleinertLabbeLjubićetal.2021, author = {Kleinert, Thomas and Labb{\´e}, Martine and Ljubić, Ivana and Schmidt, Martin}, title = {A Survey on Mixed-Integer Programming Techniques in Bilevel Optimization}, series = {EURO Journal on Computational Optimization}, journal = {EURO Journal on Computational Optimization}, url = {https://opus4.kobv.de/opus4-trr154/361}, pages = {47}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{HanteKrugSchmidt2021, author = {Hante, Falk and Krug, Richard and Schmidt, Martin}, title = {Time-Domain Decomposition for Mixed-Integer Optimal Control Problems}, url = {https://opus4.kobv.de/opus4-trr154/412}, pages = {32}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{BoettgerGrimmKleinertetal.2020, author = {B{\"o}ttger, Tom and Grimm, Veronika and Kleinert, Thomas and Schmidt, Martin}, title = {The Cost of Decoupling Trade and Transport in the European Entry-Exit Gas Market with Linear Physics Modeling}, series = {European Journal of Operational Research}, journal = {European Journal of Operational Research}, url = {https://opus4.kobv.de/opus4-trr154/316}, pages = {27}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{GrimmNowakScheweetal.2020, author = {Grimm, Veronika and Nowak, Daniel and Schewe, Lars and Schmidt, Martin and Schwartz, Alexandra and Z{\"o}ttl, Gregor}, title = {A Tractable Multi-Leader Multi-Follower Peak-Load-Pricing Model with Strategic Interaction}, doi = {10.1007/s10107-021-01708-0}, url = {https://opus4.kobv.de/opus4-trr154/317}, pages = {35}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{BiefelLiersRolfesetal.2020, author = {Biefel, Christian and Liers, Frauke and Rolfes, Jan and Schmidt, Martin}, title = {Affinely Adjustable Robust Linear Complementarity Problems}, url = {https://opus4.kobv.de/opus4-trr154/319}, pages = {20}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @misc{Manns2020, type = {Master Thesis}, author = {Manns, Julian}, title = {Presolve of Linear Bilevel Programs}, url = {https://opus4.kobv.de/opus4-trr154/320}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{ScheweSchmidtThuerauf, author = {Schewe, Lars and Schmidt, Martin and Th{\"u}rauf, Johannes}, title = {Global Optimization for the Multilevel European Gas Market System with Nonlinear Flow Models on Trees}, series = {Journal of Global Optimization}, journal = {Journal of Global Optimization}, doi = {10.1007/s10898-021-01099-8}, url = {https://opus4.kobv.de/opus4-trr154/322}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{KleinertSchmidt2020, author = {Kleinert, Thomas and Schmidt, Martin}, title = {Why there is no need to use a big-M in linear bilevel optimization: A computational study of two ready-to-use approaches}, url = {https://opus4.kobv.de/opus4-trr154/343}, pages = {8}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{GabrielLealSchmidt2020, author = {Gabriel, Steven A. and Leal, Marina and Schmidt, Martin}, title = {On Linear Bilevel Optimization Problems with Complementarity-Constrained Lower Levels}, url = {https://opus4.kobv.de/opus4-trr154/344}, pages = {16}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{RungeSoelchAlbertetal.2020, author = {Runge, Philipp and S{\"o}lch, Christian and Albert, Jakob and Wasserscheid, Peter and Z{\"o}ttl, Gregor and Grimm, Veronika}, title = {Economic comparison of electric fuels produced at excellent locations for renewable energies: A Scenario for 2035}, url = {https://opus4.kobv.de/opus4-trr154/333}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{BeckSchmidt2021, author = {Beck, Yasmine and Schmidt, Martin}, title = {A Robust Approach for Modeling Limited Observability in Bilevel Optimization}, series = {Operations Research Letters}, journal = {Operations Research Letters}, number = {49(5)}, url = {https://opus4.kobv.de/opus4-trr154/363}, pages = {752 -- 758}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{PleinThueraufLabbeetal.2021, author = {Plein, Fr{\"a}nk and Th{\"u}rauf, Johannes and Labb{\´e}, Martine and Schmidt, Martin}, title = {A Bilevel Optimization Approach to Decide the Feasibility of Bookings in the European Gas Market}, series = {Mathematical Methods of Operations Research}, journal = {Mathematical Methods of Operations Research}, doi = {10.1007/s00186-021-00752-y}, url = {https://opus4.kobv.de/opus4-trr154/364}, pages = {37}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{HeitschHenrionKleinertetal.2021, author = {Heitsch, Holger and Henrion, Ren{\´e} and Kleinert, Thomas and Schmidt, Martin}, title = {On Convex Lower-Level Black-Box Constraints in Bilevel Optimization with an Application to Gas Market Models with Chance Constraints}, url = {https://opus4.kobv.de/opus4-trr154/371}, pages = {34}, year = {2021}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GrimmRueckelSoelchetal.2019, author = {Grimm, Veronika and R{\"u}ckel, Bastian and S{\"o}lch, Christian and Z{\"o}ttl, Gregor}, title = {Regionally differentiated network fees to affect incentives for generation investment}, series = {Energy}, journal = {Energy}, number = {177}, doi = {10.1016/j.energy.2019.04.035}, url = {https://opus4.kobv.de/opus4-trr154/292}, pages = {487 -- 502}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GrimmGruebelRueckeletal.2019, author = {Grimm, Veronika and Gr{\"u}bel, Julia and R{\"u}ckel, Bastian and S{\"o}lch, Christian and Z{\"o}ttl, Gregor}, title = {Storage investment and network expansion in distribution networks: The impact of regulatory frameworks}, series = {Applied Energy}, journal = {Applied Energy}, number = {262}, doi = {10.1016/j.apenergy.2019.114017}, url = {https://opus4.kobv.de/opus4-trr154/293}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{RungeSoelchAlbertetal.2019, author = {Runge, Philipp and S{\"o}lch, Christian and Albert, Jakob and Wasserscheid, Peter and Z{\"o}ttl, Gregor and Grimm, Veronika}, title = {Economic comparison of different electric fuels for energy scenarios in 2035}, series = {Applied Energy}, journal = {Applied Energy}, number = {233-234}, doi = {10.1016/j.apenergy.2018.10.023}, url = {https://opus4.kobv.de/opus4-trr154/294}, pages = {1078 -- 1093}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{GrimmMartinSoelchetal.2019, author = {Grimm, Veronika and Martin, Alexander and S{\"o}lch, Christian and Weibelzahl, Martin and Z{\"o}ttl, Gregor}, title = {Market-Based Redispatch May Result in Inefficient Dispatch}, url = {https://opus4.kobv.de/opus4-trr154/295}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{AmbrosiusEgererGrimmetal.2019, author = {Ambrosius, Mirjam and Egerer, Jonas and Grimm, Veronika and van der Weijde, Adriaan H.}, title = {Uncertain bidding zone configurations: The role of expectations for transmission and generation capacity expansion}, series = {European Journal of Operational Research}, journal = {European Journal of Operational Research}, number = {285 (1)}, doi = {10.1016/j.ejor.2020.01.024}, url = {https://opus4.kobv.de/opus4-trr154/297}, pages = {343 -- 359}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{BichlerGrimmKretschmeretal.2019, author = {Bichler, Martin and Grimm, Veronika and Kretschmer, Sandra and Sutterer, Paul}, title = {Market Design for Renewable Energy Auctions: An Analysis of Alternative Auction Formats}, series = {Energy Economics}, journal = {Energy Economics}, number = {92}, doi = {10.1016/j.eneco.2020.104904}, url = {https://opus4.kobv.de/opus4-trr154/298}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GrimmKretschmerMehl2019, author = {Grimm, Veronika and Kretschmer, Sandra and Mehl, Simon}, title = {Green innovations: The organizational setup of pilot projects and its influence on consumer perceptions}, series = {Energy Policy}, journal = {Energy Policy}, number = {142}, doi = {10.1016/j.enpol.2020.111474}, url = {https://opus4.kobv.de/opus4-trr154/299}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{VeronikaKretschmerMehl2019, author = {Veronika, Grimm and Kretschmer, Sandra and Mehl, Simon}, title = {Home energy storage: A characterization of potential adopters in Germany}, url = {https://opus4.kobv.de/opus4-trr154/301}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KleinertGrimmSchmidt2019, author = {Kleinert, Thomas and Grimm, Veronika and Schmidt, Martin}, title = {Outer Approximation for Global Optimization of Mixed-Integer Quadratic Bilevel Problems}, series = {Mathematical Programming (Series B)}, journal = {Mathematical Programming (Series B)}, url = {https://opus4.kobv.de/opus4-trr154/302}, pages = {28}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GrimmKleinertLiersetal.2017, author = {Grimm, Veronika and Kleinert, Thomas and Liers, Frauke and Schmidt, Martin and Z{\"o}ttl, Gregor}, title = {Optimal Price Zones of Electricity Markets: A Mixed-Integer Multilevel Model and Global Solution Approaches}, series = {Optimization Methods and Software}, journal = {Optimization Methods and Software}, number = {34(2)}, url = {https://opus4.kobv.de/opus4-trr154/126}, pages = {406 -- 436}, year = {2017}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{HillerKochScheweetal.2017, author = {Hiller, Benjamin and Koch, Thorsten and Schewe, Lars and Schwarz, Robert and Schweiger, Jonas}, title = {A System to Evaluate Gas Network Capacities: Concepts and Implementation}, series = {EJOR}, journal = {EJOR}, url = {https://opus4.kobv.de/opus4-trr154/129}, year = {2017}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GrimmScheweSchmidtetal.2017, author = {Grimm, Veronika and Schewe, Lars and Schmidt, Martin and Z{\"o}ttl, Gregor}, title = {A Multilevel Model of the European Entry-Exit Gas Market}, series = {Mathematical Methods of Operations Research}, journal = {Mathematical Methods of Operations Research}, number = {89(2)}, url = {https://opus4.kobv.de/opus4-trr154/134}, pages = {223 -- 255}, year = {2017}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GugatLeugeringMartinetal.2017, author = {Gugat, Martin and Leugering, G{\"u}nter and Martin, Alexander and Schmidt, Martin and Sirvent, Mathias and Wintergerst, David}, title = {MIP-Based Instantaneous Control of Mixed-Integer PDE-Constrained Gas Transport Problems}, series = {Computational Optimization and Applications}, volume = {70}, journal = {Computational Optimization and Applications}, number = {1}, doi = {10.1007/s10589-017-9970-1}, url = {https://opus4.kobv.de/opus4-trr154/140}, pages = {267 -- 294}, year = {2017}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KramerKrebsSchmidt2018, author = {Kramer, Anja and Krebs, Vanessa and Schmidt, Martin}, title = {Strictly and Γ-Robust Counterparts of Electricity Market Models: Perfect Competition and Nash-Cournot Equilibria}, series = {Operations Research Perspectives}, journal = {Operations Research Perspectives}, number = {89(2)}, url = {https://opus4.kobv.de/opus4-trr154/238}, pages = {100197}, year = {2018}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{HojnyJoormannLuethenetal.2018, author = {Hojny, Christopher and Joormann, Imke and L{\"u}then, Hendrik and Schmidt, Martin}, title = {Mixed-Integer Programming Techniques for the Connected Max-k-Cut Problem}, series = {Mathematical Programming Computation}, journal = {Mathematical Programming Computation}, url = {https://opus4.kobv.de/opus4-trr154/239}, pages = {45}, year = {2018}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{ScheweSchmidtThuerauf2018, author = {Schewe, Lars and Schmidt, Martin and Th{\"u}rauf, Johannes}, title = {Structural Properties of Feasible Bookings in the European Entry-Exit Gas Market System}, series = {4OR}, journal = {4OR}, number = {18}, doi = {10.1007/s10288-019-00411-3}, url = {https://opus4.kobv.de/opus4-trr154/242}, pages = {197 -- 218}, year = {2018}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{AmbrosiusGrimmKleinertetal.2018, author = {Ambrosius, Mirjam and Grimm, Veronika and Kleinert, Thomas and Liers, Frauke and Schmidt, Martin and Z{\"o}ttl, Gregor}, title = {Endogenous Price Zones and Investment Incentives in Electricity Markets: An Application of Multilevel Optimization with Graph Partitioning}, series = {Energy Economics}, journal = {Energy Economics}, number = {92}, url = {https://opus4.kobv.de/opus4-trr154/243}, pages = {47}, year = {2018}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{HanteSchmidt2018, author = {Hante, Falk M. and Schmidt, Martin}, title = {Convergence of Finite-Dimensional Approximations for Mixed-Integer Optimization with Differential Equations}, series = {Control and Cybernetics}, journal = {Control and Cybernetics}, url = {https://opus4.kobv.de/opus4-trr154/244}, pages = {16}, year = {2018}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{LabbePleinSchmidt2018, author = {Labb{\´e}, Martine and Plein, Fr{\"a}nk and Schmidt, Martin}, title = {Bookings in the European Gas Market: Characterisation of Feasibility and Computational Complexity Results}, series = {Optimization and Engineering}, journal = {Optimization and Engineering}, number = {21(1)}, url = {https://opus4.kobv.de/opus4-trr154/245}, pages = {305 -- 334}, year = {2018}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KrebsSchmidt2019, author = {Krebs, Vanessa and Schmidt, Martin}, title = {Γ-Robust Linear Complementarity Problems}, series = {Optimization Methods and Software}, journal = {Optimization Methods and Software}, url = {https://opus4.kobv.de/opus4-trr154/255}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{KrugMehrmannSchmidt2019, author = {Krug, Richard and Mehrmann, Volker and Schmidt, Martin}, title = {Nonlinear Optimization of District Heating Networks}, series = {Optimization and Engineering}, journal = {Optimization and Engineering}, number = {22(2)}, url = {https://opus4.kobv.de/opus4-trr154/283}, pages = {783 -- 819}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{KrebsMuellerSchmidt2019, author = {Krebs, Vanessa and M{\"u}ller, Michael and Schmidt, Martin}, title = {Γ-Robust Linear Complementarity Problems with Ellipsoidal Uncertainty Sets}, series = {International Transactions in Operational Research}, journal = {International Transactions in Operational Research}, number = {29(1)}, url = {https://opus4.kobv.de/opus4-trr154/284}, pages = {417 -- 441}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @unpublished{SchmidtHillerKochetal.2019, author = {Schmidt, Martin and Hiller, Benjamin and Koch, Thorsten and Pfetsch, Marc and Geißler, Bj{\"o}rn and Henrion, Ren{\´e} and Joormann, Imke and Martin, Alexander and Morsi, Antonio and R{\"o}misch, Werner and Schewe, Lars and Schultz, R{\"u}diger and Steinbach, Marc C.}, title = {Capacity Evaluation for Large-Scale Gas Networks}, url = {https://opus4.kobv.de/opus4-trr154/285}, pages = {8}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{LabbePleinSchmidtetal.2019, author = {Labb{\´e}, Martine and Plein, Fr{\"a}nk and Schmidt, Martin and Th{\"u}rauf, Johannes}, title = {Deciding Feasibility of a Booking in the European Gas Market on a Cycle is in P for the Case of Passive Networks}, series = {Networks}, volume = {78}, journal = {Networks}, number = {2}, doi = {10.1007/s00186-021-00752-y}, url = {https://opus4.kobv.de/opus4-trr154/286}, pages = {128 -- 152}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{EgererGrimmKleinertetal.2019, author = {Egerer, Jonas and Grimm, Veronika and Kleinert, Thomas and Schmidt, Martin and Z{\"o}ttl, Gregor}, title = {The Impact of Neighboring Markets on Renewable Locations, Transmission Expansion, and Generation Investment}, series = {European Journal of Operational Research}, journal = {European Journal of Operational Research}, url = {https://opus4.kobv.de/opus4-trr154/289}, pages = {35}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GrimmRueckelSoelchetal.2019, author = {Grimm, Veronika and R{\"u}ckel, Bastian and S{\"o}lch, Christian and Z{\"o}ttl, Gregor}, title = {The impact of market design on transmission and generation investment in electricity markets}, series = {Energy Economics}, journal = {Energy Economics}, number = {93}, doi = {10.1016/j.eneco.2020.104934}, url = {https://opus4.kobv.de/opus4-trr154/291}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{ScheweSchmidtThuerauf2020, author = {Schewe, Lars and Schmidt, Martin and Th{\"u}rauf, Johannes}, title = {Computing Technical Capacities in the European Entry-Exit Gas Market is NP-Hard}, series = {Annals of Operations Research}, journal = {Annals of Operations Research}, number = {295}, doi = {10.1007/s10479-020-03725-2}, url = {https://opus4.kobv.de/opus4-trr154/304}, pages = {337 -- 362}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{CelebiKrebsSchmidt0202, author = {{\c{C}}elebi, Emre and Krebs, Vanessa and Schmidt, Martin}, title = {Γ-Robust Electricity Market Equilibrium Models with Transmission and Generation Investments}, series = {Energy Systems}, journal = {Energy Systems}, url = {https://opus4.kobv.de/opus4-trr154/305}, pages = {20}, year = {0202}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{GabrielLealSchmidt2020, author = {Gabriel, Steven A. and Leal, Marina and Schmidt, Martin}, title = {Solving Binary-Constrained Mixed Complementarity Problems Using Continuous Reformulations}, series = {Computers \& Operations Research}, journal = {Computers \& Operations Research}, url = {https://opus4.kobv.de/opus4-trr154/308}, pages = {24}, year = {2020}, language = {en}, type = {Preprint}, institution = {TRR 154} }