Диха, О., Т. Гедзюк, and Н. Стебелецька. “Modeling of Wear Process of the Lubricated Tribosystems With Copper Additive”. Problems of Tribology, vol. 79, no. 1, June 2016, pp. 122-7, https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/525.