Диха, О., and В. Дитинюк. 2018. “Dykha O.V., Dytynyuk V.O. An Approximate Solution to the Wear-Contact Problem for a Sliding Bearing With a Direct Friction Pair.”. Problems of Tribology 89 (3), 70-76. http://tribology.khnu.km.ua/index.php/ProbTrib/article/view/683.