1. D. L. Sponseller and R. A. Flinn: Final Report, Office of Naval Research Contract NR-039-065, September 1960.
2. J. P. Rowe and J. W. Freeman: Proceedings of Joint International Conference on Creep, The Institution of Mechanical Engineers, Session I, London, 1963, pp. 65–72.
3. F. Schubert: DEW-Technische Berichte, 1971, vol. 11, no. 2, pp. 94–100.
4. D. K. Bagchi: M. S. Thesis, University of Notre Dame, 1964.
5. A. J. Ardell and R. B. Nicholson:J. Phys. Chem. Solids, 1966, vol. 27, pp. 1793–1804.