Gordon82

M. S. Gordon, J. S. Binkley, J. A. Pople, W. J. Pietro, and W. J. Hehre, “Self-Consistent Molecular Orbital Methods. 22. Small Split-Valence Basis Sets for Second-Row Elements,” J. Am. Chem. Soc., 104 (1982) 2797-803. DOI: 10.1021/ja00374a017