@misc{Kopernik_Mikołaj_Nicolai,
 author={Kopernik, Mikołaj},
 howpublished={online},
 publisher={Petreius Johann},
 language={lat},
 type={starodruki},
 title={Nicolai Copernici Torunensis De revolutionibus orbium coelestium, Libri VII...},
 keywords={Mikołaj Kopernik (1473-1543), astronomia 16w.},
}