1. Beilsteins Handbuch des Organischen Chemie, 4th ed., Viertes Erganzungwerk, Vols. 5 and 17, Springer-Verlag Berlin, Heidelberg-New York (1976).
2. Gmehling, J. and U. Onken, “Vapor-Liquid Equilibrium Data Collection”, Vol. 1-6C, DECHEMA: Frankfurt, West Germany (1977).
3. Handbook of Chemistry and Physics, 59th ed., CRC press Inc., Florida (1979).