“Comparative Study of the Chemical Constituents of Bitter Kola (Garcinia Kola) and Cola Nut (Cola Acuminata) Seeds Extracts: , Kola, Isolation, Purification, Chromatography”. 2017. Zimbabwe Journal of Science and Technology 12 (1): 110-16. https://journals.nust.ac.zw/index.php/zjst/article/view/113.