1. National Institute of Research and Development for Optoelectronics—INOE 2000, 409 Atomistilor Street, 077125 Magurele, Romania
2. TEKNIKER, Tribology and Materials Unit, 5 Iñaki Goenaga, 20600 Eibar, Spain
3. GOIZPER S. Coop., 4 Antigua, 20577 Antzuola, Spain
4. SC MGM STAR CONSTRUCT SRL, 7 Pancota Street, 022773 Bucharest, Romania