Bala Abdullahi, Nura Mu’az Muhammad, R. K. Al-Dadah, and S. Mahmoud, “Optimum Tilt Angle for Solar Collectors used in Kano, Nigeria”, J. Adv. Res. Fluid Mech. Therm. Sc., vol. 56, no. 1, pp. 31–42, Mar. 2024.