Neil Qiang Su and Xin Xu*, Integration Approach at the Second-Order Perturbation Theory: Applications to Ionization Potential and Electron Affinity Calculations， J. Chem. Theory Comput., 2015, 11, 467

Neil Qiang Su and Xin Xu*, Integration Approach at the Second-Order Perturbation Theory: Applications to Ionization Potential and Electron Affinity Calculations， J. Chem. Theory Comput., 2015, 11, 4677-4688