Cuong, Ngo Xuan, Vo Quang Nha, and Nguyen Thi Hong. 2018. “ A Simplified Calculation Method of Electric Linear Actuators for Single-Axis Sun Tracker”. Hue University Journal of Science: Natural Science 127 (1D):47-54. https://doi.org/10.26459/hueuni-jns.v127i1D.5072.