Shrestha, J. N., and M. R. Byanjankar. “Thermal Performance Evaluation of Box Type Solar Cooker using Stone Pebbles for Thermal Energy Storage”. Journal of Renewable Energy and Smart Grid Technology, vol. 2, no. 2, Dec. 2014, pp. 24-44, https://ph01.tci-thaijo.org/index.php/RAST/article/view/26021.