1. Radom, L., Pople, J. A.: M.T.P. International review of science (Theoretical chemistry), W. Byers Brown, Ed. London: Butterworths 1972
2. Schaefer, H. F.: Ann. Rev. Phys. Chem.27, 261 (1976)
3. Pople, J. A.: Modern theoretical chemistry, H. F. Schaefer, Ed. New York: Plenum Press 1976; Hehre, W. J.: Accts. Chem. Res.9, 399 (1976)
4. Newton, M. D., Lathan, W. A., Hehre, W. J., Pople, J. A.: J. Chem. Phys.52, 4064 (1970)
5. Lathan, W. A., Hehre, W. J., Pople, J. A.: J. Am. Chem. Soc.93, 808 (1971)