Breteler, F.J. (2008) “NOVITATES GABONENSES 68. THE GENUS CASSIPOUREA (RHIZOPHORACEAE) IN CONTINENTAL TROPICAL AFRICA WITH EMPHASIS ON GABON: SUBGENERIC DIVISION, IDENTIFICATION KEYS, AND DESCRIPTION OF TWO NEW SPECIES”, Edinburgh Journal of Botany, 65(3), pp. 407–424. doi:10.1017/S0960428608005040.