Sripisuttitham, S. “INVESTIGATION OF THERMAL PERFORMANCE OF PHOTOVOLTAIC ROOF SOLAR COLLECTOR WITH PHASE CHANGE MATERIAL”. Journal of Energy and Environment Technology of Graduate School Siam Technology College, vol. 8, no. 1, June 2021, pp. 11-21, https://ph01.tci-thaijo.org/index.php/JEET/article/view/244365.