Journal of Chemical Physics, Vol.102, No.22, 8897-8905, 1995
Unitary-Group Based State-Selective Coupled-Cluster Method - Comparison of the First-Order Interacting Space and the Full Single and Double-Excitation Space Approximations
Keywords:ELECTRON CORRELATION-PROBLEM;CONFIGURATION-INTERACTION;MOLECULAR SYSTEMS;PERTURBATION-THEORY;EQUATIONS;ATOMS