M. M. Kamiński and J. Szafran, “Eigenvalue analysis for high telecommunication towers with lognormal stiffness by the response function method and SFEM”, CAMES, vol. 16, no. 3–4, pp. 279–290, Jan. 2017, Accessed: Jan. 12, 2025. [Online]. Available: https://cames3.ippt.pan.pl/index.php/cames/article/view/151