SEARCH Articles Figures Tables Electronic energy Moller-Plesset perturbation theory Moller Moller-Plesset Moller-Plesset perturbation theory derivatives, electronic energy Moller-Plesset perturbation theory relative energies Moller-Plesset perturbation theory second-order energy derivatives Moller-Plesset theory Perturbation energy Perturbation theory energy Perturbation, Moller-Plesset Perturbed energy Plesset Perturbation Theory