Verdc. (Vatke) 1975 - Verdcourt B (1975) Studies in the Rubiaceae: Rubioideae for the 'Flora of Tropical East Africa': I. Kew Bulletin 30(2): 247-326. doi: 10.2307/4103159.
There is no corrections for Triainolepis africana subsp. hildebrandtii yet.