@misc{Toennissen2020,
  author    = {Stefan T{\"o}nnissen},
  title     = {Existenzgr{\"u}ndung eines Unternehmens {\"u}ber den nebenberuflichen Einstieg},
  booktitle = {Controller Magazin},
  volume    = {36/2011},
  issn      = {0939-0359},
  institution = {ITB},
  type      = {contributiontoperiodical},
  pages     = {55 -- 58},
  year        = {2020},
}