1. 1 Department of Computational Intelligence , Częstochowa University of Technology , al. Armii Krajowej 36, 42-200 Częstochowa , Poland
2. 2 Institute of Information Technologies , University of Social Sciences , ul. Sienkiewicza 9, 90-113 Łódź , Poland
3. 3 Department of Artificial Intelligence , Lviv Polytechnic National University Lviv , , Ukraine