1. Departamento de Física; Universidad de Oviedo; 22007 Oviedo Spain
2. Department of Chemical Engineering; Münster University of Applied Sciences; 48565 Steinfurt Germany
3. Institute of Physical Chemistry; 060021 Bucharest Romania
4. Departamento de Física Teórica, Atómica y Óptica; Universidad de Valladolid; 47011 Valladolid Spain
5. Private Institute of Theoretical Chemical Physics; 6600 Muralto Switzerland