1. Institut für Physikalische und Theoretische Chemie Universität Regensburg Regenburg Germany
2. Science + Computing AG München Germany
3. Department of Mathematics and Statistics University of Victoria British Columbia Victoria Canada
4. Department of Medical Research, China Medical University Hospital China Medical University Taichung Taiwan, ROC
5. Department of Mathematics and Informatics Azerbaijan University Baku Azerbaijan
6. Department of Mathematics K. N. Toosi University of Technology Tehran Iran