1. Born, M.; Oppenheimer, R. Quantum theory of molecules.Ann. Phys.,1927,84, 457?484
2. Born, M.; Huang, K.Dynamical Theory of Crystal Lattices; Oxford University Press, London, 1954.
3. Jahn, H. A.; Teller, E. Stability of polyatomic molecules in degenerate electronic states I-orbital degeneracy.Proc. R. Soc. London. 1937,Ser. A161, 220?235.
4. For general reviews of the adiabatic approximation and vibronic coupling, consult
5. Ballhausen, C.J. Molecular Electronic Structures of Transition Metal Complexes; McGraw-Hill, New York,1979;