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A. S. Kravchuk and A. I. Kravchuk, “An approximate solution of the contact problem for the hard disk and plane with a circular hole without application of singular equations”, Журнал Белорусского государственного университета. Математика. Информатика, no. 2, pp. 59–64, Jan. 2018, Accessed: Jul. 18, 2026. [Online]. Available: https://journals.bsu.by/index.php/mathematics/article/view/750