@phdthesis{Wehinger2011,
  author      = {Frank Wehinger},
  title       = {Illegal Immigration and Legalisation in Europe},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t Trier},
  doi       = {10.25353/ubtr-xxxx-602d-26ea/},
  year        = {2011},
}