Alaribe , C. S., A. Oladipupo, A. O. Ola, C. Okeoma, A. Adeyeye, K. A. Basheeru, R. Luca, and H. A. B. Coker. “Comparative Chemical and Quantitative Analysis of Flavonoid Contents In Propolis Samples From South East (Abia) and South West (Ibadan) Of Nigeria”. Nigerian Journal of Pharmaceutical and Applied Science Research, vol. 7, no. 2, May 2018, pp. 19-27, https://nijophasr.net/index.php/nijophasr/article/view/215.