Garba, N. A., and Abdullah, S. “Proximate Analysis and Bioethanol Production Potential of Neem Leaves (Azadirachta Indica)”. International Journal of Science for Global Sustainability, vol. 5, no. 2, Dec. 2019, p. 8, https://fugus-ijsgs.com.ng/index.php/ijsgs/article/view/147.