S. Abdullahi, Musa, et al. “A New Biflavonoid Glycoside from the Leaves of Ziziphus Mucronata Willd. (Rhamnaceae): doi.org 10.26538 Tjnpr V2i4.3 ”. Tropical Journal of Natural Product Research (TJNPR), vol. 2, no. 4, Apr. 2018, pp. 167-70, https://tjnpr.org/index.php/home/article/view/540.