@article{AptrootSeaward1999,
  author    = {Andr{\´e} Aptroot and Mark R.D. Seaward},
  title     = {Annotated checklist of Hongkong lichens},
  journal   = {Tropical bryology},
  number    = {17},
  pages     = {57 -- 101},
  year      = {1999},
}