Journal of Chemical Physics, Vol.102, No.4, 1681-1688, 1995
2nd-Order Many-Body Perturbation Approximations to the Coupled-Cluster Greens-Function
Keywords:MOLECULAR IONIZATION-POTENTIALS;LINEAR RESPONSE THEORY;FOCK-SPACE;EXCITATION-ENERGIES;MODEL;EQUATION;SINGLE;FORMALISM;FRAMEWORK;CO