Ojak Abdul Rozak, Mohd Zamri Ibrahim, Muhamad Zalani Daud, Syaiful Bakhri, and Tri Eka Oktavian, “Case Study of the Effect of Tilt Angle on Output Power and Efficiency of Photovoltaic Using Two Solar Irradiation Measurement Methods”, J. Adv. Res. Appl. Sci. Eng. Tech., vol. 38, no. 1, pp. 25–36, Jan. 2024.