1. Department of Engineering in Foreign Languages, Faculty of Engineering in Foreign Languages, National University of Science and Technology POLITEHNICA Bucharest, 060042 Bucharest, Romania
2. Department of Economic Informatics and Cybernetics, Bucharest University of Economic Studies, 010552 Bucharest, Romania
3. “COSTIN C. KIRITESCU”, National Institute for Economic Research, Romanian Academy, 050711 Bucharest, Romania