1. Derzhavin Tambov State University, Internatsionalnya str. 33, 392000, Tambov, Russia
2. Trapeznikov Institute of Control Sciences, Profsoyuznaya str. 65, 117997, Moscow, Russia
3. Laboratoire des Mathematiques Appliquees et Modelisation, Universite 8 Mai 1945 Guelma, B.P. 401, 24000, Guelma, Algeria