1. T. Hirai, S. Tsukuma, T. Fujii and T. Azuma: Bulletin of the JSME Vol.21, No. 162, 1978.
2. T. Hirai and T. Ishise: Proc. of 21st Int. M.T.D.R. Conf., 1980.
3. J.B. Hawkyard, T. Hirai, T. Ishise and T. Katayama; Advanced Technology of Plasticity, 1984, Vol. II.
4. T. Hirai, T. Ishise: Int. J. of Machine Tool Design and Research, (Plastic Metal Flow Under Frictional Boundary in Forward Extrusion Die), to be published.