@article{ScheweSchmidtThuerauf2018, author = {Lars Schewe and Martin Schmidt and Johannes Th{\"u}rauf}, title = {Structural Properties of Feasible Bookings in the European Entry-Exit Gas Market System}, journal = {4OR}, number = {18}, pages = {197 -- 218}, doi = {10.1007/s10288-019-00411-3}, year = {2018}, }