1. M.Y. Farah, M.R. Zaki, S.A. El-Fekey, Thermal Analysis, v. 2, Academic Press, New York (1969) 1475–1488.
2. M.R. Zaki, S.A. El-Fekey, M.Y. Farah, 8th Mineral Processing Conf. Leningrad (1968) paper E-3.
3. M.Y. Farah, et al., 5th U. N. Conf. on Peaceful Uses of Atomic Energy, Geneva (1971) paper 146.
4. S.A. El-Fekey, M.Sc. and Ph.D. Theses, Cairo University (1967, 1972).
5. J.B. Ainscough, B.W. Oldfield, J. Appl. Chem. 12 418–24 (1962).