1. Lovkova, M.Ya., Rabinovich, A.M., Ponomareva, S.M., and Buzuluk, G.N., Pochemu rasteniya lechat (Why do Plants Cure?), Moscow: Nauka, 1989.
2. Chernobrovkin, M.G., Anan’eva, I.A., Shapovalova, E.N., and Shpigun, O.A., Zh. Anal. Khim., 2004, vol. 59, no. 1, p. 64 [J. Anal. Chem. (Engl. Transl.), vol. 59, no. 1, p. 55].
3. Ziyatdinova, G.K. and Budnikov, G.K., Pharm. Chem. J., 2005, vol. 39, no. 10, p. 561.
4. Xia Liu, Ai-Mei Yang, and Yan-Ping Shi, Zh. Anal. Khim., 2008, vol. 63, no. 5, p. 519 [J. Anal. Chem. (Engl. Transl.), vol. 63, no. 5, p. 472].
5. Kostarnoi, A.V., Golubitskii, G.B., Basova, E.M., Budko, E.V., and Ivanov, V.M., Zh. Anal. Khim., 2008, vol. 63, no. 6, p. 566 [J. Anal. Chem. (Engl. Transl.), vol. 63, no. 6, p. 516].