1. C.W. Corti,Gold Technology 2001,32, 20
2. F.E. Beamish,The Analytical Chemistry of the Noble Metals, Pergamon, Oxford, 1966
3. UNI EN ISO 11426,Determination of gold in gold jewellery alloys, 2000
4. M. Brill, K.H. Wiedemannl,Gold Bull. 1992,25, 13
5. J.C. Van Loon, R.R. Barefoot,Determination of the precious metals, Wiley, Chichester, 1991, and references therein