BioStor
 | Augustus Fendler's Venezuelan Collections of Ferns and Fern Allies Alan R Smith and Carol A Todzia (1989) Annals of the Missouri Botanical Garden 76: 330-349 |
 | Leon Croizat's Plant Collections from the Franco-Venezuelan Expedition to the Headwaters of the Rio Orinoco Bruce K Holst and Carol A Todzia (1990) Annals of the Missouri Botanical Garden 77: 485-516 |