1. F. Paulik, J. Paulik, R. Naumann, K. Köhnke and D. Petzold, Thermochim. Acta, 64 (1983) 1.
2. B. C. Lippens and I. Steggerda, Physical and Chemical Aspects of Adsorbents and Catalysts, ed. B. G. Linsen, Academic Press, London-New York 1970 p. 171.
3. R. K. Buman, A. A. Mironovics and I. A. Zaporina, Izv. Akad. Nauk Latv. SSR Khim. Ser., 4 (1975) 428.
4. R. Tertian, D. Papée, J. Chim. Phys., 55 (1958) 341.
5. W. Lodding in R. F. Schwenker and P. D. Garn (Eds.) Thermal Analysis, Proc. 2nd Int Conf., Vol. 2. Academic Press, New York, London, 1969, p. 1239.