1. Adjemian A (1994) Hydrometallurgy’ 94. Chapman & Hall, Cambridge, p 3
2. Sigel H (1998) Metal ions in biological systems. Dekker, New York, p 24
3. Scheinberg IH, Morell AG (1973) Inorganic biochemistry, vol 1. Elsevier, New York, p 306
4. Walton HF, Rocklin RD (1990) Ion exchange in analytical chemistry. CRC Press, Boca Raton
5. Keim R (1983) Gmelin handbook of inorganic chemistry, Uranium Supplement, Catadsorption and chromatography, Springer, Berlin