@misc{ComberMooneyPurvesetal.2019,
  author    = {Alexis Comber and Peter Mooney and Ross S. Purves and Duccio Rocchini and Ariane Walz},
  title     = {Crowdsourcing: it matters who the crowd are},
  booktitle = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {539},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-41089},
  institution = {Mathematisch-Naturwissenschaftliche Fakult{\"a}t},
  series    = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {539},
  type      = {postprint},
  pages     = {19},
  year        = {2019},
}