1. Laboratoire J. A. Dieudonné, C.N.R.S., Université Côte d'Azur, Nice Cedex France
2. Department of Differential Equations, Mathematical and Numerical Analysis, National Research University of Nizhni Novgorod, Nizhni Novgorod, Russia
3. Department of Fundamental Mathematics, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
4. Laboratory of Mathematics and Their Interactions, Abdelhafid Boussouf University Center, Mila, Algeria
5. Nantes Université, CNRS, IETR, UMR 6164, Nantes, France
6. Faculty of Applied Informatics, Tomas Bata University in Zlin, Zlin, Czech Republic