@misc{Knackfuss_Hermann_(1848-1915)_Dürer,
 author={Knackfuss, Hermann (1848-1915)},
 address={Bielefeld},
 howpublished={online},
 publisher={Verlag von Velhagen & Klasing},
 language={ger},
 type={książka},
 title={Dürer},
 keywords={Dürer, Albrecht (1471-1528)},
}