Neil Qiang Su and Xin Xu*, Second-Order Perturbation Theory for Fractional Occupation Systems: Applications to Ionization Potential and Electron Affinity Calculations. J. Chem. Theory Comput., 2016, 1

Neil Qiang Su and Xin Xu*, Second-Order Perturbation Theory for Fractional Occupation Systems: Applications to Ionization Potential and Electron Affinity Calculations. J. Chem. Theory Comput., 2016, 12, 2285-2297.