1. Department of Chemistry
2. Chemical Theory Center, and Minnesota Supercomputing Institute
3. University of Minnesota
4. Minneapolis
5. USA
6. Department of Chemistry and NIS Interdepartment Centre
7. University of Turin
8. 10125 Torino
9. Italy
10. Nova Res s.r.l.
11. Novara
12. Dipartimento di Scienze e Innovazione Tecnologica
13. Università del Piemonte Orientale