1. S. O. S. Anderson and H. Reinhardt ,in Handbook of Solvent Extraction,, T.C. Lo , M.H.I. Baird and C. Hanson Eds. J . Wiley & Sons, 1983 , p. 751 .
2. R. Blumberg ,in Handbook of Solvent Extraction,, T.C. Lo , M.H.I. Baird and C. Hanson , Eds. J . Wiley & Sons , 1983 , p. 826