1. Berezovskii, V.M.,Khimiya vitaminov (Chemistry of Vitamins), Moscow: Pishchepromizdat, 1959.
2. Filimonov, V.N., Kolosova, I.F., and Balyatinskaya, L.N.,Zh. Anal. Khim., 1989, vol. 64, no. 8, p. 1433.
3. Zolotov, Yu.A. and Kuz’min, N.M.,Kontsentrirovanie mikroelementov (Preconcentration of Trace Elements), Moscow: Khimiya, 1982.
4. Schoenmakers, P.G.,Optimization of Chromatographic Selectivity, Amsterdam: Elsevier, 1986. Translated under the titleOptimizatsiya selektivnosti v khromatografii, Moscow: Mir, 1989.
5. Filimonov, V.N., Kolosova, I.F., and Balyatinskaya, L.N.,Zh. Fiz. Khim., 1994, vol. 68, no. 10, p. 1835.