1. Nabarro, F. R. N., Steady state diffusional creep, Phil. Mag., 1976, A16: 231.
2. Backofen, W. A., Murty, G. S., Zehr, S. W., Evidence for diffusional creep with low strain rate sensitivity, Trans. Metall. Soc. AIME., 1968, 242: 329.
3. Mukheerjeea, A. K., The rate controlling mechanism in superplasticity, Mater. Sci. Eng., 1971, 8: 83.
4. Lee, D., Structural changes during the superplastic deformation, Met. Trans., 1970, 1: 309.
5. Giffkins, R. C., Grain rearrangements during superplastic deformation, J. Mater. Sci., 1978, 13: 1926.