Institution: | (1) Department of Chemistry, Faculty of Science, University of Beograd, POB 550, YU-11001 Beograd, Yugoslavia;(2) Boris Kidri Institute of Nuclear Sciences, Vina, POB 522, YU-11001 Beograd, Yugoslavia;(3) Present address: Centro de estudios nucleares, Universidad National Autonoma de Mexico, Circuito Exterior, Ciudad Universitaria, Mexico 20, D.F., Mexico |