Duszek, M. and Łodygowski, T. (1985) “Тhе Post-Yield Analysis of Rigid Plastic Beams Columns and Frames”,
Engineering Transactions
, 33(1-2), pp. 173–203. Available at:
https://et.ippt.pan.pl/index.php/et/article/view/1841
(Accessed: 13 July 2025).