Alkali, B., B. S. Elkanah, S. G. Amarem, A. B. Hassan, N. S. Gukop, and E. A. P. Egbe. “Development of a Windmill for Pumping Water Using Positive Displacement Pump”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 17, no. 3, Sept. 2021, pp. 269-78, https://azojete.com.ng/index.php/azojete/article/view/442.