Simbiano, F. J., C. Couch, S. Magassouba, X. M. van der Burgt, J. Plummer, and M. Cheek. “Keetia Tinka & K. Kounounkan Sp. Nov. (Rubiaceae - Vanguerieae) New Threatened Forest Climbers and Shrubs of Sandstone Plateaux of the Republic of Guinea”. Webbia, vol. 80, no. 2, Nov. 2025, pp. 183-95, doi:10.36253/jopt-19152.