1. Institute of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, Budapest H-1117, Hungary
2. Department of Numerical Analysis, Faculty of Informatics, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest H-1117, Hungary
3. Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom