1. Institute of Chemical Technology Prague, Department of Metals and Corrosion Engineering, Technická 5, 166 28 Prague 6, Czech Republic
2. Institute of Plasma Physics CAS, v.v.i., Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic
3. UJP Praha a.s., Nad Kamínkou 1345, 156 10 Praha-Zbraslav, Czech Republic