@article{KuehnBeckerHarpkeetal.2022,
  author    = {Elisabeth K{\"u}hn and Marc Becker and Alexander Harpke and Ingolf K{\"u}hn and Christian Kuhlicke and Thomas Schmitt and Josef Settele and Martin Musche},
  title     = {The benefits of counting butterflies: recommendations for a successful citizen science project},
  journal   = {Ecology and Society},
  volume    = {27},
  number    = {2},
  doi       = {10.5751/ES-12861-270238},
  year      = {2022},
}