@misc{Kepler_Johann_Friedrich_Dioptrice,
 author={Kepler, Johann Friedrich},
 howpublished={online},
 publisher={Flesher J.},
 language={lat},
 type={starodruk},
 title={Dioptrice seu demonstratio. T.3},
 keywords={astronomia 17w., optyka 17w., nauka 17w.},
}