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2. L. A. Galin, Contact Problems, Springer, Berlin (2008).
3. O. P. Datsyshyn, A. Yu. Hlazov, and A. B. Levus, "Specific features of contact of the faces of an edge crack under moving Hertzian loads," Fiz.-Khim. Mekh. Mater., 49, No. 5, 31-41 (2013); English translation:
4. Mater. Sci., 49, No. 5, 589-601 (2014).
5. O. P. Datsyshyn and H. P. Marchenko, "Stressed state of a half plane with shallow edge crack under Hertzian loading (a survey)," Fiz.-Khim. Mekh. Mater., 44, No. 1, 23-34 (2008); English translation: