1. 1University of Oradea, Faculty of Energy Engineering and Industrial Management, Department of Textiles, Leather and Industrial Management, B.St. Delavrancea Str., no. 4, 410058, Oradea, Romania
2. Trakia University, Faculty of Technics and Technologies, 38 Graf Ignatiev str., 8602, Yambol, Bulgaria
3. University of Oradea, Faculty of Geography, Tourism and Sport, 1st University Street, 410087, Oradea, Romania
4. 4University of Oradea, Faculty of Civil Engineering, Cadastral Survey and Architecture, Department of Cadastral Survey, B.St. Delavrancea str. No. 4, 410058, Oradea, Romania
5. Aurel Vlaicu” University of Arad, Research Development Innovation in Technical and Natural Science Institute, 2-4 Elena Dragoi Street, 310330, Arad, Romania