1. &Cbreve;í&zbreve;ek, J. (1966) J. Chem. Phys., 45, pp. 4256.
2. &Cbreve;í&zbreve;ek, J. (1969) Adv. Chem. Phys., 14, pp. 35.
3. &Cbreve;í&zbreve;ek, J and Paldus, J. (1971) Int. J. Quant. Chem., 5, pp. 359.
4. Paldus, J and &Cbreve;í&zbreve;ek, J and Shavitt, I. (1972) Phys. Rev. A, 5, pp. 50.
5. Bartlett, RJ. (1989) J. phys. Chem., 93, pp. 1693.