@unpublished{WaltherHillerSaitenmacher2017, author = {Walther, Tom and Hiller, Benjamin and Saitenmacher, Ren{\´e}}, title = {Polyhedral 3D Models for compressors in gas networks}, url = {https://opus4.kobv.de/opus4-trr154/201}, year = {2017}, language = {en}, type = {Preprint}, institution = {TRR 154} } @techreport{WaltherHiller2017, type = {Working Paper}, author = {Walther, Tom and Hiller, Benjamin}, title = {Modelling compressor stations in gas networks}, url = {https://opus4.kobv.de/opus4-trr154/203}, year = {2017}, language = {en}, type = {Preprint}, institution = {TRR 154} }