1. Taras Shevchenko National University of Kyiv, Volodymyrska Str. 64, 01601 Kyiv, Ukraine
2. Centre
for Research in Molecular Modeling and Department of Chemistry and
Biochemistry, Concordia University, Montréal, QC H4B1R6, Canada
3. Department
of Physics and Astronomy, East Tennessee State University, Johnson City, Tennessee 37614, United States