1. Saratov State University,Laboratory of Nonlinear Dynamics Modelling Saratov Branch of the Institute of RadioEngineering and Electronics of Russian Academy of Science,Department of Dynamic Modeling and Biomedical Engineering,Saratov,Russia
2. Saratov Branch of the Institute of RadioEngineering and Electronics of Russian Academy of Science,Laboratory of Nonlinear Dynamics Modelling,Saratov,Russia