@misc{Kepler_Joannes_Ad,
 author={Kepler, Joannes},
 howpublished={online},
 publisher={C. Marnius et Haered. J. Aubrii},
 language={lat},
 type={starodruki},
 title={Ad Vitelionem paralipomena, quibus astronomiae pars optica traditur [...] Authore Ioanne Keplero [...]},
 keywords={astronomia 17w.},
}