1. Faculty of Mechanical Engineering, Department of AET, Discipline of Descriptive Geometry and Engineering Graphics; Technical University of Cluj-Napoca; 103-105 B-dul Muncii St. Cluj-Napoca 400641 Cluj Romania
2. Faculty of Computer Science and Materials Science, Department of Biomedical Computer Systems, Institute of Informatics; University of Silesia; Będzińska 39 41-205 Sosnowiec Poland
3. Material Science Research Laboratory, Department of Physics; Guru Nanak Dev University; Amritsar 143005 India
4. Faculty of Chemical Technology, Department of General and Inorganic Chemistry; University of Pardubice; Pardubice, Studentska 573 Pardubice 532 10 Czech Republic