1. Department of Knitting and Clothing, Faculty of Textiles, Leather and Industrial Management, “Gheorghe Asachi” Technical University, Iasi, Romania, D. Mangeron, 29, 700050 – Iasi
2. Department of Mathematics, Informatics and Educational Sciences, Faculty of Sciences, “Vasile Alecsandri” University of Bacau, Romania, Calea Marasesti, 157, 600115–Bacau
3. Department of Marketing and Management “Vasile Alecsandri” University of Bacău, Calea Marasesti, 157, 600115 – Bacau
4. Physics Department, “Gheorghe Asachi” Technical University, 700050, Iasi, Romania