Institution: | a Peoples Friendship University, Miklukho-Maklaya Str. 6, 117198 Moscow, Russia b Moscow State University, Faculty of Computational Mathematics and Cybernetics, Department of Operations Research, Leninskiye Gori, GSP-2, 119992 Moscow, Russia c Faculty of Natural Sciences, University of Montenegro, Cetinjski put bb, 81000 Podgorica, Montenegro |