@article{FresardKopp2008,
  author    = {Raymond Fr{\´e}sard and Thilo Kopp},
  title     = {Exact results in a slave boson saddle point approach for a strongly correlated electron model},
  journal   = {Physical Review B},
  volume    = {78},
  number    = {7},
  pages     = {073108},
  doi       = {10.1103/physrevb.78.073108},
  year      = {2008},
}