Дрогомирецький, Я., А. Василик, І. Довжинський, and Г. Долгопола. “Thermal Field Modelling of Peripheral Bearing Plain Surface of Three-Roller Cone Bit under Friction”. Problems of Tribology, vol. 66, no. 4, July 2014, pp. 34-37, https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/265.