Agada, L. E., M. S. Yakubu, and R. A. Lateef. “Investigation of the Impact of Drought on Groundwater: A Case Study of Yobe State, Nigeria”. Nigerian Journal of Physics, vol. 32, no. 2, Dec. 2023, pp. 160-72, https://njp.nipngr.org/index.php/njp/article/view/306.