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2. T.S. West, Complexometry with EDTA and Related Reagents, BDH, Poole, 1969.
3. R. Pribil, Applied Complexometry, Pergamon Press, Oxford, 1982.
4. Anonymous, Complexometric Assay Methods with Titriplex, Merck, Darmstadt no date.
5. M.A. Leonard, in: G. Svehla (Ed.), Wilson and Wilson’s Comprehensive Analytical Chemistry, Vol. 8, Elsevier, Amsterdam, 1977, p. 207.