Literature

• Encyclopedia of Life. [link]
• Axelrod, F.S. 2015. A Systematic Vademecum to the Vascular Plants of Sint Eustatius. 179 pp.

Literature references linked to higher taxa

• Catalogue of Life. Species 2000 & ITIS. [link] (Polypodiopsida)
• The Plant List 2013. The Plant List version 1.1. [link] (Elaphoglossum)