@article{10504,
  author = {A. Hernández and P. Langhoff},
  title = {On Rayleigh-Schrödinger and green's-function calculations of ionization potentials and electron affinities},
  year = {1977},
  journal = {Chemical Physics Letters},
  volume = {49},
  pages = {421-426},
  month = {1977-08},
  issn = {00092614},
  url = {http://linkinghub.elsevier.com/retrieve/pii/0009261477870061},
  doi = {10.1016/0009-2614(77)87006-1},
}