Gentianaceae im Germplasm Resources Information Network (GRIN), USDA, ARS, National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland.
Werner Greuter & Rosa Rankin: Bisgoeppertia (Gentianaceae) unravelled. Account of a small genus of the Greater Antilles, In: Willdenowia - Annals of the Botanic Garden and Botanical Museum Berlin-Dahlem, Volume 38, Number 1, 2008, S. 177–185: doi:10.3372/wi.38.38112
David John Mabberley: Mabberley’s Plant-Book. A portable dictionary of plants, their classification and uses. 3. Auflage. Cambridge University Press, 2008, ISBN 978-0-521-82071-4 (eingeschränkte Vorschau in der Google-Buchsuche).
