@misc{Birkenmajer_Aleksander_(1890-1967)_Mikolaj,
 author={Birkenmajer, Aleksander (1890-1967)},
 copyright={Birkenmajer-Hogard, Maria},
 address={Berlin},
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 type={artykuł},
 title={Mikolaj Kopernik},
}