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2. Complicated ecological estimation for the environment;A.A. Chendeva,2013
3. Chukanov, V.N., Deryagina, S.E., Astaf’eva, O.V., et al., Ecological state of industrial territories: method for compex estimation, Uralo-Sibirskaya nauchno-prakticheskaya konf.: mater. dokladov (Proc. Ural-Siberian Sci.-Pract. Conf.), Yekaterinburg, June 23–24, 2003, pp. 268-269.
4. Dobrovol’skii, G.V. and Nikitin, E.D., Uchenie ob ekologicheskikh funktsiyakh pochv (Doctrine on Soils Ecological Functions), Moscow, 2012.
5. Federal Law no. 7-FZ “On Environment Protecting,” January 10, 2002.