1. V. G. Dashevskii, Conformational analysis of organic molecules [in Russian], Khimiya, Moscow (1982).
2. L. A. Gribov and S. P. Mushtakova, Quantum Chemistry [in Russian], Gardariki, Moscow (1999).
3. V. A. Terent`ev, Thermodynamics of the Donor-Acceptor Bond [in Russian], Saratov Univ., Saratov (1981).
4. V. G. Tsirel`son, Chemical Bond and Intermolecular Interactions. Lectures on quantum chemistry [in Russian], Mendeleev Russian Chemical Technological University, Moscow (2004).
5. E. Arunan, G. R. Desiraju, R. A. Klein, J. Sadlej, S. Scheiner, I. Alkorta, D. C. Clary, R. H. Crabtree, J. J. Dannenberg, P. Hobza, H. G. Kjaergaard, A. C. Legon, B. Mennucci, and D. J. Nesbitt, Pure Appl. Chem., 83, No. 8, 1619 (2011).