1. G. P. Bespamyatnov and Yu. A. Krotov, Maximum Permissible Concentrations of Chemical Substances in the Environment (Khimiya, Leningrad, 1985) [in Russian].
2. B. P. Zolotovskii, R. A. Saifullin, and S. A. Molchanov, Kataliz v Promyshlennosti, No. 6, 51 (2003).
3. T. K. Khanmamedov, Khim. Tekhn. Topliv Masel, No. 6, 7 (2003).
4. Z. R. Ismagilov, M. A. Kerzhentsev, S. R. Khairulin, and V. V. Kuznetsov, Khim. Interesah Ustoich. Razvit. 7, 375 (1999).
5. V. N. Parmon, Zh. Obshch. Khim., No. 8, 1703 (1992).