1. Friction and Lubrication of Solids;Bowden,1954
2. The area of contact between rough surfaces and flats;Greenwood;Trans. ASME,1967
3. Plastic contact of surfaces;Williamson;Burndy Res. Rept. No. 78 and 79,1970
4. On the mechanism of contact between solid surfaces;Tsukizoe;Trans. ASME,1968
5. Deformation of single and multiple asperities on metal surfaces;Uppal;Wear,1972