Nguyen Viet Ngu, and Nguyen Trung Kien. “APPLYING PLC AND WINCC TO CONTROLLING AND SUPERVISING CONCRETE MIXING PLANT”. UTEHY Journal of Applied Science and Technology, Vol. 14, July 2017, pp. 56-61, http://jst.utehy.edu.vn/index.php/jst/article/view/187.