Odebode, A. C. “Phenolic Compounds in the Kola Nut (<i>Cola nitida</i> and <i>Cola acuminata</i≫) (Sterculiaceae) in Africa”. Revista De Biología Tropical, vol. 44, no. 2A, Aug. 1996, pp. 513–515, https://revistas.ucr.ac.cr/index.php/rbt/article/view/21640.