TY - RPRT TI - Parallel coupled perturbed CASSCF equations and analytic CASSCF second derivatives. AU - Timothy J Dudley AU - Ryan M Olson AU - Michael W Schmidt AU - Mark S Gordon PY - 2006 DO - 10.1002/jcc.20350 UR - https://pubmed.ncbi.nlm.nih.gov/16365869/ ID - 16365869 ER -