1. Aristotle University of Thessaloniki, Department of Chemistry, Laboratory of Inorganic Chemistry, P.O.B. 135, GR‐541 24 Thessaloniki, Greece, http://www.chem.auth.gr/index.php
2. Adam Mickiewicz University, Faculty of Chemistry, 60 780 Poznań, Poland, http://www.chemia.amu.edu.pl/main/staff/Gdaniec.htm
3. Department of Chemistry and Bioengineering, Tampere University of Technology, 33101 Tampere, Finland, http://kemia.me.tut.fi/nick