SEARCH Articles Figures Tables CISD (configuration interaction singles and Configuration Interaction Configuration interaction singly excited Configuration interaction singly excited configurations Configuration interaction theory single-reference Brillouin-Wigner Configuration interaction with singles and doubles Configuration interaction—singles-only Configurational interaction Configurational interaction singles Configurational interaction singles INDO/singles configuration interaction Multireference configuration interaction with singles level Multireference single- and double-excitation configuration interaction Quadratic configuration interaction including single and double substitutions Quadratic configuration interaction single and Quadratic configuration interaction single-level method Quadratic configuration interaction singles and doubles Quadratic configuration interaction with double and single excitations Quadratic configuration interaction with singles and doubles Single excitation configuration interactions approach Single reference configuration interaction Single reference configuration interaction expansions Single-double configuration interaction Single-double configuration interaction calculations Single-excitation configuration interaction Single/double excitation configurational interaction calculations