1. P. Pulay, Mol. Phys. 18:473 (1970).
2. J.W. Mclver Jr. and A. Komornicki, Chem.Phys.Lett. 10:303 (1971).
3. J. Gerratt and I.M. Mills, J.Chem.Phys. 49:1719 (1968).
4. “Geometrical Derivatives of Energy Sufarces And Molecular Properties”, P. Jorgensen and J. Simons Editors, NATO ASI Series C.166, Reidel Publishing Co., 1985.
5. “Computer-Aided Chemistry For Molecular Properties And Molecular Design”, IBM Europe Institute, Oberlech, Austria, 1992.