1. Coulson, C. A., Moffitt, W. E.: Phil. Mag. 40, 1 (1949).
2. Walsh, A. D.: Trans. Faraday Soc. 45, 179 (1949).
3. These are listed in Richards, W. G., Walker, T. E. H., Hinkley, R. D.: A bibliography of ab initio molecular wave functions. London: Oxford University Press 1971
4. Radom, L., Pople, J. A.: MTP Int. rev. science, theor. chem. Ed. W. Byers Brown). London: Butterworth, in press.
5. Roothaan, C. C. J.: Rev. Mod. Phys. 23, 69 (1951).