Checklist of the plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana).

Funk, V., Hollowell, T., Berry, P., Kelloff, C., Alexander, S. N., (2007). Contributions from the United States National Herbarium 55, 584 pp. Department of Systematic Biology - Botany, National Museum of Natural History, Smithsonian Institution, Washington, USA. English language