Вельбой, В.П., and М.О. Диха. 2014. “Velboj V.P., Dykha M. O. Calculation of Contact Parameters at the Rolling-off of Cylinder by a Torus.”. Problems of Tribology 68 (2), 104-9. https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/149.