Шевеля, В., Б. Купец, Ю. Соколан, and Г. Калда. “ Sclerometric Characteristics and Acoustic-Emissive Activity of Thermal Strengthened Steel”. Problems of Tribology, vol. 79, no. 1, June 2016, pp. 6-15, https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/506.