O.  Lachenaud, Droissart, V., Dessein, S., Stevart, T., Simo, M., Lemaire, B., Taedoumg, H., and Sonké, B., ?New records for the flora of Cameroon, including a new species of Psychotria (Rubiaceae) and range extensions for some rare species?, Plant Ecology and Evolution, vol. 146, pp. 121-133, 2013.