Dorosz S, Sawczuk A, Biegus A, Kowal Z, Seidel W. Post-Yield Deflection of Elastic-Plastic Beams Under Uniformly Increasing Loads. Eng. Trans. 1980;29(2):279-294. Accessed July 19, 2025. https://et.ippt.pan.pl/index.php/et/article/view/2051