1. Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade-Zemun, Serbia
2. Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion, UPR CNRS 288, Ecole Centrale Paris, Grande Voie des Vignes, 92295 Châtenay Malabry, France
3. Institute of Nuclear Sciences “Vinca,” University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia
4. Institute for Multidisciplinary Researches, University of Belgrade, P.O. Box 33, 11030 Belgrade, Serbia
5. Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA