Vo Thi Huong, Nguyen Ngoc Quang, Chu Thi Thanh Tho, Pham Ngoc Thang, and Do Thanh Hieu. 2018. “AN IMPROVED P&O MAXIMUM POWER POINT TRACKING METHOD FOR PHOTOVOLTAIC SYSTEMS UNDER RAPIDLY CHANGING IRRADIANCE CONDITIONS”. UTEHY Journal of Applied Science and Technology 19 (October), 22-28. http://jst.utehy.edu.vn/index.php/jst/article/view/83.