S. Dorosz, A. Sawczuk, A. Biegus, Z. Kowal, and W. Seidel, “Post-Yield Deflection of Elastic-Plastic Beams Under Uniformly Increasing Loads”, Eng. Trans., vol. 29, no. 2, pp. 279–294, Jun. 1980, Accessed: Jul. 15, 2025. [Online]. Available: https://et.ippt.pan.pl/index.php/et/article/view/2051