Owen, O. J., B. P. Briggs, and H. H. Gunn. “Performance of Broiler Chickens Administered Graded Levels of Bitter Kola (Garcinia Kola, Heckel) As Feed Additive”. Nigerian Journal of Animal Production 46, no. 5 (December 19, 2020): 107 –. Accessed September 22, 2026. https://mail.njap.org.ng/index.php/njap/article/view/283.