Кубич, В., Щаднев, А. and Ивщенко, Л. 2014. By the method of determining the path of friction in friction units to the complex plane-parallel motion / V.I. Kubich, A.O. Shchadniev, L.I. Ivschenko // Problems of Tribology. – 2012. – № 1. – Р. 45-51. Problems of Tribology. 63, 1 (Jul. 2014), 45–51.