Tsung, Kheng Yew, and Yun Ii Go. “Sunshine-Based Global Solar Radiation Modelling: Case Study of Putrajaya, Malaysia”. Journal of Energy and Safety Technology (JEST) 3, no. 1 (November 3, 2020). Accessed January 11, 2026. https://jest.utm.my/index.php/jest/article/view/62.