1. 1) J.O. Marsden, C.I. House, “The Chemistry of Gold Extraction”, 2nd Edition, 2006, Society for Mining, Metallurgy, and Exploration, Inc. (SME), Littleton, Colorado, chapter 4.
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3. 3) F.A. Cotton, G. Wilkinson, “Advanced Inorganic Chemistry: A Comprehensive Text”, 4th Edition, 1980, Wiley, New York, chapter 6.
4. 4) G.A. Olah, R. Malhotra, S.C. Narang, “Nitration: Methods and Mechanisms”, VCH, New York, 1989.
5. 5) R.A. Robinson, R.H. Stokes, “Electrolyte Solutions, 2nd Revised Edition, 1970, Butterworth & Co., London, p. 378, Dover Edition, 2002.