“Influence of mixed boundary conditions and heterogeneity on the vibration behavior of orthotropic truncated conical shells”, Arch. Mech., vol. 67, no. 4, pp. 331–348, Aug. 2015, Accessed: May 13, 2025. [Online]. Available: https://am3.ippt.pan.pl/index.php/am/article/view/v67p331