Quoc Chi, Nguyen, and Nguyen Tien Khang. “A Vision Anti-Sway Control Algorithm for Container Cranes”. Science and Technology Development Journal 20, no. K1 (March 31, 2017): 35-41. Accessed February 19, 2019. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/410.