Saran, M. and Kleiber, M. (1984) “A Note on the Perturbation Approach to Nonlinear Static Analysis of Elastic Plane Trusses”, Engineering Transactions, 32(3), pp. 315–327. Available at: https://et3.ippt.pan.pl/index.php/et/article/view/1899 (Accessed: 9 June 2025).