Kourkoulis, S. and Exadaktylos, G. (2001) “The displacement discontinuity technique in fracture mechanics: the subsurface crack problem”, Archives of Mechanics, 53(4-5), pp. 421–437. Available at: https://am.ippt.pan.pl/index.php/am/article/view/v53p421 (Accessed: 21 December 2025).