@misc{Peter_Anton_Das,
 author={Peter, Anton},
 howpublished={online},
 publisher={Karl Graeser},
 language={ger},
 type={monografia},
 title={Das Herzogthum Schlesien},
 keywords={Śląsk Cieszyński, Śląsk Karniowski, Śląsk austriacki, Śląsk Opawski},
}