รัตนกร นภณัฐ, and Chonlatee Photong. 2021. “Low-Cost Solar Insolation Measurement System Using Estimation Technique from the Brightness Sensor”. Rajamangala University of Technology Srivijaya Research Journal 13 (2):382-92. https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/227389.