M. Sokołowski and E. Turska-Kłębek, “On the Approximate Evaluation of Interaction of Cracks in Elastic Media”, Eng. Trans., vol. 31, no. 1, pp. 115–150, Mar. 1983, Accessed: Jan. 17, 2026. [Online]. Available: http://et.ippt.gov.pl/index.php/et/article/view/1930