Srisukpornchai, Natchais, Watchara Wongpanyo, Bunyawat Vichanpol, and Wattanapong Rakwichian. 2020. “Technical & Economic Evaluation of the University of Phayao Solar PV Rooftop System”. Journal of Renewable Energy and Smart Grid Technology 15 (2):1-15. https://ph01.tci-thaijo.org/index.php/RAST/article/view/242588.