G. Damen, “On the Three-Dimensional Contact Problem of a Rigid Inclusion Pressed Between Two Elastic Half-Spaces”, Eng. Trans., vol. 25, no. 3, pp. 483–493, Sep. 1977, Accessed: Jan. 17, 2026. [Online]. Available: http://et.ippt.gov.pl/index.php/et/article/view/2198