[1] Budapest Univ Technol & Econ, Fac Econ & Social Sci, PhD Sch Business & Management, Muegyet Rkp 3, H-1111 Budapest, Hungary
[2] Budapest Univ Technol & Econ, Fac Econ & Social Sci, Dept Ergon & Psychol, Muegyet Rkp 3, H-1111 Budapest, Hungary
[3] Obuda Univ, Kando Kalman Fac Elect Engn, Tavaszmezo U 17, H-1084 Budapest, Hungary
[4] Szechenyi Istvan Univ, Janos Csere Apaczai Fac, Egyet Ter 1, H-9026 Gyor, Hungary