@misc{Helwing_Michael_Oratio,
 author={Helwing, Michael},
 howpublished={online},
 publisher={Michael Lantzeneberger},
 language={lat},
 title={Oratio de optimo rei publicae statu eiusdemque Salute... Michaele Helvvingio...},
 type={stary druk},
 keywords={druk okolicznościowy, odczyty naukowe, Hellwing, Michael (1601-1678)},
}