1. Khrapkovskii, G.M., Chachkov, D.V., and Shamov, A.G., Zh. Obshch. Khim., 2001, vol. 71, no.9, p. 1443.
2. Becke, A.D., J. Chem. Phys., 1993, vol. 98, p. 1372.
3. Politzer, P. and Lane, P., J. Mol. Struct. (THEOCHEM), 1996, vol. 388, p. 51.
4. Tafipolsky, M.A., Tokmakov, I.V., and Shlyapochnikov, V.A., J. Mol. Struct., 1999, vol. 510, p. 149.
5. Shamov, A.G. and Khrapkovskii, G.M., Mendeleev Commun., 2001, no. 4, p. 163.