1. Department of Chemistry, Centre for Theoretical and Computational Chemistry, University of Oslo, Oslo, Norway
2. Department of Chemistry, Aarhus University, Aarhus C, Denmark
3. Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, Trieste, Italy
4. Department of Chemistry, Centre for Theoretical and Computational Chemistry, , University of Tromsø, Tromsø, Norway