1. F. A. Mohamed and T. G. Langdon,Acta Metall. 23, 117 (1975).
2. F. A. Mohamed and T. G. Langdon,Phil. Mag. 32, 697 (1975).
3. B. P. Kashyap and A. K. Mukherjee, inSuperplasticity, (eds., B. Baudelet and M. Suery), p. 1, CNRS,4 (1988).
4. E. Sato, K. Kuribayashi and R. Horiuchi,J. Jpn. lnst. Met. 55, 151 (1991).
5. A. K. Mukherjee, inMater. Sci. Tech., Vol. 6, Plastic Deformation and Fracture of Materials, (ed. H. Mughrabi), p. 407, VCH, Weinheim (1993).