@techreport{repORt:2019-54,
	author = {M. L\"{u}bbecke and C. Puchert and Ph. Schiewe and A. Sch\"{o}bel},
	title = {Integrating line planning, timetabling, and vehicle scheduling: Integer programming formulation and analysis},
	institution = {Lehrstuhl f\"{u}r Operations Research, RWTH Aachen University},
	year = {2019},
	type = {repORt},
	number = {2019--54},
	month = {Feb},
	url = {https://or.rwth-aachen.de/files/research/repORt/2019-integrating_line_time_veh.pdf}
}