@misc{Nicolai_Henryk_(1605-1660)_De,
 author={Nicolai, Henryk (1605-1660)},
 howpublished={online},
 publisher={Gedani},
 publisher={Typis Georgii Rhetii [...]},
 language={lat},
 language={grc},
 type={stary druk},
 title={De Contradictionis Natura & principio, Tractatus Singularis. Philosophico-Theologicus [...] /},
}