@article{EhlertKlamroth2016,
  author    = {Christopher Ehlert and Tillmann Klamroth},
  title     = {The quest for best suited references for configuration interaction singles calculations of core excited states},
  journal   = {Journal of computational chemistry : organic, inorganic, physical, biological},
  volume    = {38},
  pages     = {116 -- 126},
  doi       = {10.1002/jcc.24531},
  year      = {2016},
}