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- Cremers, G., Hickey, R.J., Lellinger, D.B., Mickel, J.T., Moran, R.C., Øllgaard, B. & Smith, A.R. 2007. Pteridophytes & allies. In Funk, V., Hollowell, T., Berry, P., Kelloff, C. & Alexander, S.N., Checklist of the plants of the Guiana Shield (Venezuela: Amazonas, Bolivar, Delta Amacuro; Guyana, Surinam, French Guiana). Contributions from the United States National Herbarium 55: 17–56. BHL