Kravchuk AS, Kravchuk AI. 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. 2018;(2):59-64. Accessed July 19, 2026. https://journals.bsu.by/index.php/mathematics/article/view/750