Nguyen Nhat Thang, Bui Hai Le, Tran Duc Trung, and Tran Minh Thuy. “On - off Controls in the Problem of Bending Beams”. Vietnam Journal of Science and Technology 51, no. 6 (March 6, 2018): 681–688. Accessed March 19, 2026. https://cip.vast.vn/jst/article/view/11630.