@article{Eggensperger2001,
  author    = {Eggensperger, Karl-Heinz},
  title     = {Projekt Hyperbuch : Entwicklung eines elektronischen Mediums f{\"u}r den fachbezogenen Fremdsprachenunterricht},
  year      = {2001},
  language  = {de}
}
@book{CantallopsOtero2001,
  author    = {Cantallops, Esperanza and Otero, Conchita},
  title     = {Sin rodeos : curso intensivo de espa{\~n}ol [Hauptband]},
  publisher = {Egert},
  address   = {Wilhelmsfeld},
  isbn      = {3-926972-84-x},
  pages     = {XII, 250 S.},
  year      = {2001},
  language  = {es}
}
@article{Eggensperger2001,
  author    = {Eggensperger, Karl-Heinz},
  title     = {Zertifikationssysteme f{\"u}r vier romanische Sprachen und UNIcert},
  isbn      = {3-925453-33-4},
  year      = {2001},
  language  = {de}
}