1. Department of Chemistry University of Oslo P.O. Box 1033 Blindern 0315 Oslo Norway
2. Hylleraas Centre for Quantum Molecular Sciences Department of Chemistry University of Oslo P.O. Box 1033 Blindern 0315 Oslo Norway
3. Department of Chemistry UiT-The Arctic University of Norway 9037 Tromsø Norway
4. SINTEF Industry P.O. Box 124 Blindern 0314 Oslo Norway