Curtiss98

L. A. Curtiss, K. Raghavachari, P. C. Redfern, V. Rassolov, and J. A. Pople, “Gaussian-3 (G3) theory for molecules containing first and second-row atoms,” J. Chem. Phys., 109 (1998) 7764-76. DOI: 10.1063/1.477422