ALKALI, B.; ELKANAH, B. S.; AMAREM, S. G.; HASSAN, A. B.; GUKOP, N. S.; EGBE, E. A. P. Development of a windmill for pumping water using positive displacement pump. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, v. 17, n. 3, p. 269-278, 1 Sep. 2021.