(en) Isildo Gomes et al., Endemic plants and indigenous trees of the Cape Verde islands, Ministry of Environment, Agriculture and Fishery and the Projects « Conservation and Exploration of the Natural Resources on the Island Fogo » (Deutsche Gesellschaft für Technische Zusammenarbeitand) and « Conservation of Biodiversity », 2003, 36 p.
(en) Maria M. Romeiras, Silvia Catarino, Isildo Gomes, Claudia Fernandes, Jose C. Costa, Juli Caujapé-Castells et Maria Cristina Duarte, « IUCN Red List assessment of the Cape Verde endemic flora: towards a global strategy for plant conservation in Macaronesia », Botanical Journal of the Linnean Society, vol. 180, no 3, , p. 413–425 (lire en ligne)