รัตนกร นภณัฐ, and Chonlatee Photong. “Low-Cost Solar Insolation Measurement System Using Estimation Technique from the Brightness Sensor”. Rajamangala University of Technology Srivijaya Research Journal 13, no. 2 (July 27, 2021): 382–392. Accessed May 8, 2024. https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/227389.