1. Polarography;KOLTHOFF,1952
2. Textbook of Quantitative Inorganic Analysis;VOGEL,1961
3. Les Réactions Electrochimiques;CHARLOT,1959
4. Principles and Applications of Polarography and other Electro-analytical Processes;MLLNER,1957
5. KOLTHOFF, I. M. and LINGANE, J. J., ref. 1, p. 165.