@misc{Curtze_Maximilian_(1837-1903)_Nicolaus,
 author={Curtze, Maximilian (1837-1903)},
 address={Berlin},
 howpublished={online},
 publisher={Verlag von Hermann Paetel},
 language={ger},
 type={książka},
 title={Nicolaus Copernicus : eine biographische Skizze},
}