@misc{Sturm_Rudolf_(1841-1919)_Koppernicus,
 author={Sturm, Rudolf (1841-1919)},
 address={Breslau},
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 type={artykuł},
 title={Koppernicus und seine Vorfahren},
}