Affiliation: | Institute of Chemistry, University of Novi Sad, 21000 Novi Sad, Veljka Vlahovi?a 2, Yugoslavia;Institute of Physics, University of Novi Sad, 21000 Novi Sad Ilije Djuri?i?a 4, Yugoslavia;Central Research Institute of Chemistry, Hungarian Academy of Sciences, Budapest 114, P.O.Box 17., H-1525 Hungary |