Ntore, Salvator, Jacques Nkengurutse, Sander de Backer, Bonaventure Sonké, Petra De Block, Steven B. Janssens, Brecht Verstraete, and Elmar Robbrecht. “Calycosiphonia or Kupeantha (Coffeeae, Rubiaceae)? A Morphological and Molecular Study of a New Species from the Albertine Rift”. European Journal of Taxonomy 935, no. 1 (May 17, 2024): 1–28. Accessed April 24, 2026. https://ejt.sandbox.publicknowledgeproject.org/index.php/ejt/article/view/2539.