Sirikaew, S., S. Pattarapanitchai, S. Khakhu, and S. Janjai. “A Solar-Powered Vapor Compression Refrigeration System for Vaccine Storage”. Journal of Renewable Energy and Smart Grid Technology, vol. 17, no. 2, Dec. 2022, pp. 1-8, https://ph01.tci-thaijo.org/index.php/RAST/article/view/250650.