Цибаньов, Г., В. Марчук, В. Калініченко, and О. Радько. “Research of Influence of the Ionic Nitriding Is on a Structure and Properties of Discrete Surfaces in the Conditions of Tribocontact”. Problems of Tribology, vol. 62, no. 4, July 2014, pp. 34-39, https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/284.