Диха, О.В., and А.А. Вичавка. 2016. “Dykha O.V., Vychavka A.A. Calculation Estimation of Wear Sliding Directing With Lubricating Grooves of Triangular Profile”. Problems of Tribology 81 (3):98. https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/92.