Гладкий, Я., and О. Маковкін. “ Tribo-Behaviour of Instrumental Steels "У8А" and ‘ХВГ’ in the Process of Friction and Wear”. Problems of Tribology, vol. 70, no. 4, July 2014, pp. 12-19, https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/175.