@misc{Stapper2012,
  author    = {Norbert J. Stapper},
  title     = {Illustrierte Bestimmungshilfe zur Unterscheidung von Candelaria concolor und Candelaria pacifica},
  issn      = {1868-4173},
  series    = {Archive for lichenology},
  number    = {7},
  type      = {workingpaper},
  pages     = {12},
  year        = {2012},
}