Sokołowski, M. “On an Effective Method of The Effect of Cavities, Inclusions and Crack Upon the Stress Fields in Elastic Media”. Engineering Transactions 34, no. 1-2 (June 30, 1986): 139–170. Accessed June 9, 2025. https://et3.ippt.pan.pl/index.php/et/article/view/1801.