SEARCH Articles Figures Tables A posteriori Brillouin-Wigner correction to limited multi-reference configuration interaction Brillouin-Wigner configuration interaction theory, multi-reference Internally contracted multi-reference configuration interaction Limited configuration interaction multi-reference Brillouin-Wigner MRCI (multi-reference configuration Multi configuration Multi-Reference Configuration Interaction MRCI) methods Multi-reference Brillouin-Wigner configuration interaction Multi-reference Brillouin-Wigner perturbation theory for limited configuration interaction Multi-reference configuration interaction Multi-reference configuration interaction , performance Multi-reference configuration interaction MRCI) Multi-reference configuration interaction MRCI) approaches Multi-reference configuration interaction calculations Multi-reference method configuration interaction Multi-reference-configuration interaction coupled-clusters Reference configuration