1. Research Center for Environment and Materials, Macedonian Academy of Sciences and Arts, Skopje, North Macedonia
2. Geological Survey of Slovenia, Ljubljana, Slovenia
3. INCDO-INOE 2000 Research Institute for Analytical Instrumentation (ICIA), Cluj-Napoca, Romania
4. Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss Cyril and Methodius University in Skopje, Skopje, North Macedonia