Cuong, Ngo Xuan, Vo Quang Nha, and Nguyen Thi Hong. “ A Simplified Calculation Method of Electric Linear Actuators for Single-Axis Sun Tracker”. Hue University Journal of Science: Natural Science 127, no. 1D (December 10, 2018): 47-54. Accessed May 5, 2024. https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/5072.