1. See, for instance, A. Messiah, Quantum Mechanics (Wiley, New York, 1966), Vol. II, pp. 747–750.
2. W. H. Miller and T. F. George, J. Chem. Phys. 56, 5637 (1972). JCPSA60021-9606
3. For applications of the theory see an extensive series of recent papers by George and co‐workers, especially: Y.‐W. Lin, T. F. George, and K. Morokuma, Chem. Phys. Lett. 22, 547 (1973); CHPLBC0009-2614
4. Y.‐W. Lin, T. F. George, and K. Morokuma, J. Chem. Phys. 60, 4311 (1974); JCPSA60021-9606
5. Y.‐W. Lin, T. F. George, and K. Morokuma, Chem. Phys. Lett. 30, 49 (1975); CHPLBC0009-2614