Zemagho, L., Lachenaud, O., Dessein, S., Liede-Schumann, S. & Sonké, B. (2014)

Two new Sabicea (Rubiaceae) species from West Central Africa: Sabicea bullata and Sabicea urniformis

. Phytotaxa 173 (4): 285–292. https://doi.org/10.11646/phytotaxa.173.4.3