1. Department of Economics, Mathematics-Informatics and Statistics-Econometrics, National and Kapodistrian University of Athens, Sofokleous 1 Street, 10559 Athens, Greece
2. Laboratory “Hybrid Methods of Modelling and Optimization in Complex Systems”, Siberian Federal University, Prospect Svobodny 79, 660041 Krasnoyarsk, Russia
3. Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia
4. Institute of Informatics and Telecommunications, Reshetnev Siberian State University of Science and Technology, Prospect Krasnoyarskiy Rabochiy 31, 660037 Krasnoyarsk, Russia