1. V. I. Minkin, B. Ya. Sinkin, and R. M. Minyaev, Theory of Molecular Structure (Feniks, Rostov-on-Don, 1997) [in Russian].
2. M. J. S. Dewar, Theory of Molecular Orbitals (McGraw-Hill, New York, 1969; Mir, Moscow, 1972).
3. C. K. Ingold, Structure and Mechanism in Organic Chemistry (Cornell Univ. Press, Ithaca, N. Y., 1969; Mir, Moscow, 1973).
4. R. J. Gillespie, Molecular Geometry (Van Nostrand Reinhold, New York, 1972; Mir, Moscow, 1975).
5. I. B. Bersuker, Electronic Structure and Properties of Coordination Compounds (Khimiya, Leningrad, 1986) [in Russian].