@article{Aptroot1998,
  author    = {Andr{\´e} Aptroot},
  title     = {New lichens and lichen records from Papua New Guinea : with the description of Crustospathula, a new genus in the Bacidiaceae},
  journal   = {Tropical bryology},
  number    = {14},
  pages     = {25 -- 34},
  year      = {1998},
}