1. Department of Chemistry, Faculty of Education, Trnava University in Trnava, Trnava, Slovak Republic
2. Department of Ecochemistry and Radioecology, Faculty of Natural Sciences, University of SS. Cyril and Methodius in Trnava, Trnava, Slovak Republic
3. Institute of Materials Science, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology in Bratislava, Trnava, Slovak Republic
4. Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Košice, Košice, Slovak Republic
5. Energy Department, AIT Austrian Institute of Technology GmbH, Tulln an Der Donau, Austria