:term:`SF_RESTRICT <SF_RESTRICT (DETCI)>`
"""""""""""""""""""""""""""""""""""""""""

      Do eliminate determinants not valid for spin-complete spin-flip CI's? [see J. S. Sears et al, J. Chem. Phys. 118, 9084-9094 (2003)] 

      * **Type**: :ref:`boolean <op_c_boolean>`
      * **Default**: false

