1. MEXEO Wiesław
Hreczuch, ul. Energetyków 9, 47-225 Kędzierzyn-Koźle, Poland
2. Faculty
of Chemistry, Opole University, ul. Oleska 48, 45-052 Opole, Poland
3. Institute
of Chemistry, University of Silesia, ul. 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland