SEARCH Articles Figures Tables Fourth-order Moller-Plesset Fourth-order Moller-Plesset perturbation Moller Moller fourth-order Moller-Plesset Moller-Plesset perturbation theory order Moller-Plesset theory Perturbation order Perturbation theory fourth order Perturbation, Moller-Plesset Plesset Perturbation Theory