“Comparative Study of the Chemical Constituents of Bitter Kola (Garcinia Kola) and Cola Nut (Cola Acuminata) Seeds Extracts: , Kola, Isolation, Purification, Chromatography”. Zimbabwe Journal of Science and Technology, vol. 12, no. 1, May 2017, pp. 110-6, https://journals.nust.ac.zw/index.php/zjst/article/view/113.