1. Department of Mechanical Engineering, North Dakota State University, Fargo, USA
2. Laboratory for Surface Technology and Tribology, Department of Engineering Technology, University of Twente, Enschede, Netherlands
3. School of Mechanical and Materials Engineering, Washington State University, Pullman, USA
4. Center for Micro and Nanoscale Dynamics of Dispersed Systems, Bashkir State University, Ufa, Russia