@inproceedings{BorndoerferNeumannPfetsch2009, author = {Ralf Bornd{\"o}rfer and Marika Neumann and Marc Pfetsch}, title = {Line Planning and Connectivity}, booktitle = {Models and Algorithms for Optimization in Logistics}, editor = {Cynthia Barnhart and Uwe Clausen and Ulrich Lauther and Rolf M{\"o}hring}, number = {09261}, year = {2009}, }