1. New Developments for the Qualification of Technical Surface in Forming Process, Annals;Geiger;of the CIRP,1997
2. A Mechanism of Lubricant Trapping in Slow Speed Compression;Osakada;Int. J. Mech. Sci.,1977
3. Azushima, A., Tsubouchi, M. and Kudo, H., 1990, Direct Observation of Lubricant Behavior under the Micro-PHL at the Interface between Workpiece and Die, Proc. 3rd ICTP, 1;551–556.
4. The Influence of Base Lubricant Viscosity and Boundary Additive on Surface Contact and Friction during Metal Deformation;Butler;J. Inst. Metals,1960
5. Direct Observation of Measurement Behavior at the Interface between Tool and Workpiece in Lubricated Upsetting;Azushima;Annals of CIRP,1996