1. M. J. Frisch, G. W. Trucks, H. B. Schlegel, et al., Gaussian 03, Gaussian Inc., USA, Pittsburgh PA (2003).
2. M. W. Schmidt, K. K. Baldridge, J. A. Boatz, et al., J. Comput. Chem., 14, 1347 (1993).
3. R. P. Feinman, Phys. Rev., 56, 340 (1939).
4. M. Born and R. Oppenheimer, Ann. d. Phys., 84, 457 (1927).
5. L. A. Gribov and V. I. Baranov, Theory and Methods for the Calculation of Molecular Processes: Spectra, Chemical Transformations and Molecular Logic [in Russian], KomKniga, URSS, Moscow (2006).