[1] Lodz Univ Technol, Inst Math, PL-90924 Lodz, Poland
[2] Nanjing Normal Univ, Sch Business, Nanjing 210046, Peoples R China
[3] Slovak Univ Technol Bratislava, Fac Civil Engn, SK-81005 Bratislava, Slovakia
[4] Univ Ostrava, Inst Res & Applicat Fuzzy Modelling, CZ-70103 Ostrava, Czech Republic
[5] Iona Coll, Machine Intelligence Inst, New Rochelle, NY 10801 USA