@misc{Luther_Martin_(1483-1546)._Widder,
 author={Luther, Martin (1483-1546).},
 howpublished={online},
 publisher={[Melchior Lotter d.J.]},
 language={ger},
 title={Widder die Bullen des Endchrists / Doctor Martinus Luther.},
 type={stary druk},
}