Hehre72

W. J. Hehre, R. Ditchfield, and J. A. Pople, “Self-Consistent Molecular Orbital Methods. 12. Further extensions of Gaussian-type basis sets for use in molecular-orbital studies of organic-molecules,” J. Chem. Phys., 56 (1972) 2257. DOI: 10.1063/1.1677527