1. Institute of Chemistry, Agricultural and Pedagogical University, 3-go Maja 54, 08-110, Siedlce, Poland
2. Institute für Phyikalische Chemie, Technische Hochschule Petersenstr. 20, D-6100, Darmstadt, FRG
3. Institute of Physics of the Jagellonian University, Reymonta 4, 30-059, Kraków, Poland