@article{BorndoerferKarbsteinPfetsch2012, author = {Ralf Bornd{\"o}rfer and Marika Karbstein and Marc Pfetsch}, title = {Models for Fare Planning in Public Transport}, journal = {Discrete Applied Mathematics}, volume = {160}, number = {18}, pages = {2591 -- 2605}, doi = {10.1016/j.dam.2012.02.027}, year = {2012}, }