@article{BuschGeertsemaLanzendorfKlinner2021,
  author    = {Annika Busch-Geertsema and Martin Lanzendorf and Nora Klinner},
  title     = {Making public transport irresistible? The introduction of a free public transport ticket for state employees and its effects on mode use},
  journal   = {Transport policy},
  volume    = {106},
  pages     = {249 -- 261},
  doi       = {10.1016/j.tranpol.2021.04.007},
  year      = {2021},
}