Kowal-Michalska, K. and Grądzki, R. (1986) “The Post-Buckling Behaviour of Thin-Walled Columns in the Elasto-Plastic Range”, Engineering Transactions, 34(4), pp. 503–515. Available at: https://et3.ippt.pan.pl/index.php/et/article/view/1825 (Accessed: 9 June 2025).