@misc{FrahmJanssenSchumacheretal.2009,
  author    = {Jan-Peter Frahm and Anne-Maike Janßen and Judith Schumacher and Daniela Th{\"o}nnes and Stephanie Hensel and Birgit Heidelbach and David Erler},
  title     = {Das Nitrophytenproblem bei epiphytischen Flechten - eine Synthese},
  booktitle = {Archive for lichenology ; 5},
  issn      = {1868-4173},
  series    = {Archive for lichenology},
  number    = {5},
  type      = {workingpaper},
  pages     = {8},
  year        = {2009},
}