@article{BraigEtte2004,
  author    = {Braig, Marianne and Ette, Ottmar},
  title     = {Presentaci{\´o}n},
  year      = {2004},
  language  = {es}
}
@article{BraigEtte2005,
  author    = {Braig, Marianne and Ette, Ottmar},
  title     = {Presentaci{\´o}n : dossier construcciones hemisf{\´e}ricas},
  year      = {2005},
  language  = {es}
}