Fischer, E., Killmann, D. and Meve, U. (2013) “Neoschumannia gishwatiensis (Apocynaceae, Asclepiadoideae-Ceropegieae) from Gishwati Forest, Rwanda—a third and new species from a disjunct African genus”, Phytotaxa. Auckland, New Zealand, 77(2), pp. 19–26. doi: 10.11646/phytotaxa.77.2.1.