Fernandes, R./Fernandes, A. 1978. Taxon detail for Adenia digitata (Harv.) Engl. Flora Zambesiaca. Kew Gardens database. FZ volume:4 part:0 (1978) Passifloraceae by R. and A. Fernandes.
Online details: http://apps.kew.org/efloras/namedetail.do?qry=namelist&flora=fz&taxon=3798&nameid=9061