H.J.T. Venter, R.L. Verhoeven:Raphionacme elsana (Periplocaceae), a new species from Natal, South Africa. In: South African Journal of Botany. Band53, Nr.2, April 1987, ISSN0254-6299, S.177–179, doi:10.1016/S0254-6299(16)31455-7.
H.J.T. Venter, R.L. Verhoeven:Raphionacme elsana (Periplocaceae), a new species from Natal, South Africa. In: South African Journal of Botany. Band53, Nr.2, April 1987, ISSN0254-6299, S.177–179, doi:10.1016/S0254-6299(16)31455-7.