@phdthesis{Landgraf2015,
  author      = {Andreas Landgraf},
  title       = {Part-time entrepreneurship: Micro-level and macro-level determinants},
  type        = {doctoralthesis},
  school      = {Universit{\"a}t Trier},
  doi       = {10.25353/ubtr-xxxx-7f4c-bfbd},
  year        = {2015},
}