1.
Alkaff A. MONTHLY AVERAGE DAILY INSOLATION AND OPTIMUM TILT ANGLE OF SOLAR COLLECTOR IN P.D.R. YEMEN Period. Polytech. Mech. Eng. [Internet]. 1991 Jan. 1 [cited 2024 Jul. 3];35(3):183-98. Available from: https://pp.bme.hu/me/article/view/5597