Кубич, В.; Щаднев, А.; Ивщенко, Л. 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. PT 2014, 63, 45-51.