@article{198,
  keywords = {paper},
  author = {J Berger and Lucia Reining and Francesco Sottile},
  title = {Ab initio calculations of electronic excitations: Collapsing spectral sums},
  year = {2010},
  journal = {Phys. Rev. B},
  volume = {82},
  number = {4},
  pages = {041103(R)},
  month = {Jul},
  publisher = {American Physical Society},
  doi = {10.1103/PhysRevB.82.041103},
}