@misc{Nicolai_Henryk_(1605-1660)_De,
 author={Nicolai, Henryk (1605-1660)},
 howpublished={online},
 publisher={Rhere Georg - Vidua et Haeredes},
 language={lat},
 title={De Causa Per Accidens, Tractatus Singularis [...]},
 type={starodruk},
}