1. University of Belgrade, Faculty of Chemistry Studentski trg 12–16 11000 Belgrade Serbia
2. Institute of Chemistry Technology and Metallurgy (ICTM), Center of Chemistry Njegoševa 12 11000 Belgrade Serbia
3. University of Bani Waleed, Faculty of Science, Chemistry Department Industrial high school street 51, Centre of Bani Waleed Libya
4. Geological Survey of Denmark and Greenland (GEUS) Øster Voldgade 10 1350 København K Denmark