1. “Coriolan Dragulescu” Institute of Chemistry, 24 Mihai Viteazu Bv., 300223 Timisoara, Romania
2. Faculty of Chemistry, Biology, Geography, West University of Timisoara, 16 Pestalozzi Street, 300115 Timisoara, Romania
3. Elkim Special SRL, 21Constantin cel Mare St., 300290 Timisoara, Romania