S. Karpiński, “Finite Element Applications to Evaluate the Stress and Strain Field in the Vicinity of an Imperfection in Thin Shells”, Eng. Trans., vol. 43, no. 4, pp. 545–552, Dec. 1995, Accessed: Jan. 17, 2026. [Online]. Available: http://et.ippt.gov.pl/index.php/et/article/view/1516