@misc{Ioannes_Eligerus_de_Gunderslauen_De,
 author={Ioannes Eligerus de Gunderslauen},
 address={Żytawa? (Zittau)},
 address={Praga?},
 howpublished={online},
 language={lat},
 type={rękopis},
 title={De utilitate quadrantis},
 keywords={kwadrant},
}