Venter (A.Chev.) 2009 - Venter Hj.t. (2009) A taxonomic revision of Raphionacme (Apocynaceae: Periplocoideae). South African Journal of Botany 75(2): 292-350. doi: 10.1016/j.sajb.2009.02.174.
There is no corrections for Raphionacme splendens subsp. bingeri yet.