1. Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, HR-31000 Osijek, Croatia
2. Department of Electronics and Instrumentation, Institute of Technical Education and Research, Siksha O Anusandhan University, Bhubaneswar-751030, India
3. Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, SI-1000 Ljubljana, Slovenia
4. Institute of Mathematics and Physics & Mechanics, University of Ljubljana, Jadranska 19, SI-1000 Ljubljana, Slovenia