Pham Thanh Tung, Nguyen Quoc Dai, and Le Dinh Tung. “A SOLUTION TO DEVELOP BIKE SHARING SERVICE IN VIETNAM”. UTEHY Journal of Applied Science and Technology, Vol. 18, July 2018, pp. 20-22, http://jst.utehy.edu.vn/index.php/jst/article/view/104.