1. G.D. Brykina, D.O. Marchenko, O.A. Shpygun, Zh. Anal. Khim. 50 (1995) 484 (in Russian).
2. R.F. Gur'eva, S.B. Savvin, Zh. Anal. Khim. 52 (1997) 247 (in Russian).
3. O.P. Shvoeva, V.P. Dedkova, A.G. Gitlits, S.B. Savvin, Zh. Anal. Khim. 52 (1997) 89 (in Russian).
4. S.B. Savvin, A.V. Mikhaylova, Zh. Anal. Khim. 51 (1996) 49 (in Russian).
5. Preconcentration of silver(I), gold(III) and palladium(II) in sea water with p-dimethylaminobenzylidenerhodanine supported on silica gel