1. Pulay, P. In Modern Theoretical Chemistry; Schaefer, H. F., III, Ed. Plenum: New York, 1977; Vol. 4, pp 153–185.
2. Császár, A. G.; Allen, W. D.; Yamaguchi, Y.; Schaefer, H. F., III. In Computational molecular spectroscopy; Jensen, P., Bunker, P. R., Eds. Wiley: Chichester, 2000; pp 15–68.
3. Ab Initio Molecular Dynamics