1. Coggeshall, N. D...J. Chem. Phys., 1950,18, 978.
2. Venkata Ramiah, K. and Puranik, P. G.Proc. Ind. Acad. Sci., August 1962.
3. Huggins, C. H. and Pimental, G. C.J. Phys. Chem., 1956,60, 1615.
4. Cohurn, W. C. and Grunwald, E.J. Amer. Chem. Phys., 1958,80, 1318.
5. Millikan, R. C. and Pitzer, K. S.J. Chem. Soc., 1957,27, 1305.