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