1. Pol Duwez and R. H. Willens:Trans. TMS-AIME, 1963, vol. 227, pp. 362–65.
2. Pol Duwez:Trans. ASM, 1967, vol. 60, pp. 607–33.
3. P. Ramachandrarao: Ph.D. Thesis, Banaras Hindu University, Varanasi, India, 1968.
4. B. W. MOtt: AERE Special Report, 1967.
5. M. W. Ozelton, J. R. Wilson and J.N. Pratt:Rev. Int. Hautes Temper. et Refract., 1967, vol. 4, pp. 109–11.