1. Kuz’min, N.M.,Zh. Anal. Khim., 1996, vol. 51, no. 2, p. 208.
2. Simonova, V.I.,Atomno-absorbtsionnye metody opredeleniya elementov v porodakh i mineralakh (Elemental Analysis of Ores and Minerals Using Atomic Absorption Spectrometry), Novosibirsk: Nauka, 1986.
3. Dmitriev, S.N., Krasnov, A.V., Lebedev, V.Ya., and Flerov, G.N., USSR Inventor’s Certificate no. 1816990,Byull. Izobret., 1993, no. 19.
4. Chmilenko, F.A., Pivovarov, A.A., Derkach, T.M., and Kuksenko, A.N.,Zh. Anal. Khim., 1997, vol. 52, no. 4, p. 352.
5. Shabanov, A.P., Dzhafarova, E.Z., and Beger, I.R.,Zh. Anal. Khim., 1987, vol. 42, no. 4, p. 660.