1. PPG Architectural Coatings EMEA, Primalex a.s., 33824 Břasy, Czech Republic
2. Faculty of Chemistry, University of Wroclaw, 14 F. Joliot‐Curie, 50383 Wroclaw, Poland, Fax: +48‐713‐757‐307
3. Laboratory of Growth Regulators, Institute of Experimental Botany ASCR & Palacký University Šlechtitelů 11, 78371 Olomouc, Czech Republic
4. Environmental Inorganic Chemistry, Department of Chemical and Biological Engineering, Chalmers University of Technology, 41296 Göteborg, Sweden
5. Institute of Inorganic Chemistry, Technology and Materials, Slovak University of Technology 81237 Bratislava, Slovakia