1. Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550 Stuttgart, Germany
2. School of Chemistry, Faculty of Science & Agriculture, University of KwaZulu-Natal, Private Bag X01, Pietermaritzburg, 3209 South Africa
3. J. Heyrovský
Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-18223
Prague, Czech Republic