@article{TanEngel1990,
  author    = {Benito C. Tan and John J. Engel},
  title     = {A preliminary study on the affinities of Philippine, Bornean and New Guinean hepatics},
  journal   = {Tropical bryology},
  volume    = {2},
  pages     = {265 -- 272},
  year      = {1990},
}