1. M. V. Banzilevskii, Molecular Orbit Method and Reactivity of Organic Molecules [in Russian], Khimiya, Moscow (1969).
2. Yu. B. Malykhanov, Teor. Éksp. Khim.,10, No. 1, 26?36 (1974).
3. I. Ando and G. A. Webb, Theory of NMR Parameters, Academic Press, London?New York (1983).
4. J. P. Doucet, B. Angian, and J. E. Dubois, J. Chim. Phys.-Chim. Biol.,69, No. 2, 188?195 (1972).
5. Yu. B. Vysotskii, Zh. Strukt. Khim.,19, No. 1, 34?41 (1978).