1. F.S. Stone, Advance in Catalysis, Academic Press, New York, 1962, p. 13.
2. V.A. Dzisko, Proc. Intern. Congr. Catalysis, 3rd, Amsterdam, 1 (1964) 422.
3. M. Katz, Advances in Catalysis, Academic Press, New York, 1953, p. 5.
4. F. Basolo, R.G. Pearson, Mechanism of Inorganic Reactions, Wiley, New York, 1967.
5. Phosphates as Catalysts