@phdthesis{Schroll2004,
  author      = {Karl-Georg Schroll},
  title       = {Potenziale und Marktchancen f{\"u}r den {\"O}PNV in der Fl{\"a}che},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t Trier},
  doi       = {10.25353/ubtr-xxxx-4211-bce1/},
  year        = {2004},
}