A Configuration Model for the Line Planning Problem. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein (ATMOS, 2013)

An Extended Formulation for the Line Planning Problem. - Heide Hoppmann (OR, 2015)

Separation of Cycle Inequalities for the Periodic Timetabling Problem. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein (ESA, 2016)

The Modulo Network Simplex with Integrated Passenger Routing. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein; Fabian Löbel (OR, 2016)

Passenger routing for periodic timetable optimization. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein (Public Transp., 2017)

Separation of cycle inequalities in periodic timetabling. - Ralf Borndörfer; Heide Hoppmann; Marika Karbstein; Niels Lindner (Discret. Optim., 2020)