Kien, Nguyen Dinh, and Do Quoc Quang. “Beam Element for Large Displacement Analysis of Elasto-Plastic Frames”. Vietnam Journal of Mechanics 26, no. 1 (April 1, 2004): 39–54. Accessed April 12, 2025. https://vjs.ac.vn/index.php/vjmech/article/view/5688.