@article{FlorschuetzdeWaard1992,
  author    = {J. Florsch{\"u}tz-de Waard},
  title     = {A revision of the genus Potamium (Musci: Sematophyllaceae).},
  journal   = {Tropical bryology},
  number    = {5},
  pages     = {109 -- 121},
  year      = {1992},
}