@book{KoenigHaratschBonini2000,
  author    = {Koenig, Christian and Haratsch, Andreas and Bonini, Monica},
  title     = {Diritto Europeo},
  publisher = {Giuffr{\`e} Editore},
  address   = {Mailand},
  isbn      = {88-14079-2-42},
  pages     = {418 S.},
  year      = {2000},
  language  = {it}
}
@book{KoenigHaratschKoenig2006,
  author    = {Koenig, Christian and Haratsch, Andreas and Koenig, Christian},
  title     = {Europarecht},
  publisher = {Mohr Siebeck},
  address   = {T{\"u}bingen},
  isbn      = {3-16-148922-5},
  pages     = {563 S.},
  year      = {2006},
  language  = {de}
}
@book{KoenigHaratsch2000,
  author    = {Koenig, Christian and Haratsch, Andreas},
  title     = {Europarecht},
  publisher = {Mohr-Siebeck},
  address   = {T{\"u}bingen},
  isbn      = {3-16-147331-0},
  pages     = {374 S.},
  year      = {2000},
  language  = {de}
}