Hung, Nguyen Dang, and Hoang Van Long. “Automatic Limit and Shakedown Analysis of 3-D Steel Frames”. <i>Vietnam Journal of Mechanics</i> 29, no. 3 (September 22, 2007): 337–351. Accessed November 8, 2025. https://vjmech.vast.vn/vjmech/article/view/5544.