Almalih, A., A. K. Azab, and M. E. ElRefaie. “An Experimental Investigation of Optimizing a Water-Based Photovoltaic Thermal (PVT) System through Reduced Tube Spacing”. Engineering, Technology & Applied Science Research, vol. 15, no. 5, Oct. 2025, pp. 26323-9, doi:10.48084/etasr.12227.