1. James, A.M. and Prichard, F.E., Practical Physical Chemistry, III, Burnt Mill, Harlow, Essex, Longman, Eds., CM20 2JE, 1967, p. 302.
2. Levitt, B.P. and Kitchener, J.A., Findlay’s Practical Physical Chemistry IX, London and New York: Longman, 1972, p. 420.