DUSZEK, M.K.; ŁODYGOWSKI, T. Тhе Post-Yield Analysis of Rigid Plastic Beams Columns and Frames. Engineering Transactions, [S. l.], v. 33, n. 1-2, p. 173–203, 1985. Disponível em: https://et3.ippt.pan.pl/index.php/et/article/view/1841. Acesso em: 9 jun. 2025.