Head-Gordon94a

M. Head-Gordon, R. J. Rico, M. Oumi, and T. J. Lee, “A Doubles Correction to Electronic Excited-States from Configuration-Interaction in the Space of Single Substitutions,” Chem. Phys. Lett., 219 (1994) 21-29. DOI: 10.1016/0009-2614(94)00070-0