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2. M. J. STOWELL, in “Superplastic Forming of Structural Alloys”, edited by N. E. PATON and C. H. HAMILTON (TMSAIME, Warrendale, PA., USA, 1982) p. 321.
3. N. RIDLEY and J. PILLING, in “Superplasticity”, edited by B. BAUDELET and M. SUERY (CNRS, Paris, 1985) paper 8.
4. M. SUERY, ibid.in “, paper 9.
5. A. H. CHOKSHI and A. K. MUKHERJEE, in “Superplasticity and Superplastic Forming”, edited by C. H. HAMILTON and N. E. PATON (TMS, Warrendale, PA., USA, 1988) p. 149.