@misc{Frahm2009,
  author    = {Jan-Peter Frahm},
  title     = {A preliminary study of the infraspecific taxa of Hypnum cupressiforme in Europe},
  booktitle = {40},
  series    = {Archive for Bryology},
  number    = {040},
  type      = {periodicalpart},
  pages     = {10},
  year        = {2009},
}