1. 1 Romanian Academy, Research Institute for Quality of Life , Calea 13 Septembrie, no. 13, 050711 , Bucharest , Romania
2. 2 “Lucian Blaga” University of Sibiu , Faculty of Social Sciences and Humanities , Lucian Blaga Street, no. 2A, 550169 , Sibiu , Romania
3. 3 Polytechnical University of Bucharest , Splaiul Independenței , no. 313, 060042 , Bucharest , Romania