@misc{Büthner_Wilhelm_(_-1654)_Gymnasii,
 author={Büthner, Wilhelm ( -1654)},
 howpublished={online},
 publisher={Dantisci},
 publisher={Typis Viduæ Georgii Rhetii},
 language={lat},
 type={stary druk},
 title={Gymnasii Ethici Exercitatio III. : De Actu Morali. Qvam Præside Henrico Nicolai [...]},
}