SEARCH Articles Figures Tables Moller Moller second-order Moller-Plesset Moller-Plesset perturbation theory second-order energy derivatives Moller-Plesset second-order Moller-Plesset second-order perturbation theory Moller-Plesset theory Second-order theory Some Applications of Second-order Many-body Perturbation Theory with a Moller-Plesset Reference Hamiltonian