BioStor
 | Taxonomic and nomenclatural notes on Jamaican gamopetalous plants W T Stearn (1971) Journal of the Arnold Arboretum 52: 614-648 |
 | A revision of the genera Hieroglyphus Krauss, Parahieroglyphus Carl and Hieroglyphodes Uvarov (Orthoptera: Acridoidea) Joyce Barbara Mason (1973) Bulletin Br Mus nat Hist (Ent) 28(7): 507-560 |
 | Chromosome numbers of South African Acanthaceae Thomas F Daniel, Kevin Balkwill and Mandy-Jane Balkwill (2000) Proceedings of the California Academy of Sciences 52: 143-158 |