1. Raluca Ripan Institute of Research in Chemistry, Babes-Bolyai University, Cluj-Napoca, Romania
2. Department of Civil Engineering and Management, Technical University of Cluj-Napoca, Cluj-Napoca, Romania
3. Physics and Chemistry Department, Technical University, Cluj-Napoca, Romania
4. Institute of Material Engineering, Faculty of Material Engineering and Physics, Cracow University of Technology, Cracow, Poland