1. M. Berthelot, Ann. chim. phys. [5]15, 185 (1878).
2. V. B. Parker, Thermal Properties of Uni-Univalent Electrolytes. NSRDS-NBS 2, Washington, D.C.: National Bureau of Standards, 1965.
3. W. Ramsay, Verganenes und K�nftiges aus der Chemie (deutsche �bersetzung vonW. Ostwald), S. 155. Leipzig: Akademische Verlagsgesellschaft. 1909.
4. F. R. Bichowsky undF. D. Rossini, The Thermochemistry of the Chemical Substances. New York: Reinhold. 1936. (Second Printing 1948.)
5. F. D. Rossini, D. D. Wagman, W. H. Evans, S. Levine undE. Jaffe, Selected Values of Chemical Thermodynamic Properties. NBS Circular 500, Washington, D.C., 1952.