@misc{Petersen_Julius_(1839–1910)_Theorie_1878,
 author={Petersen, Julius (1839–1910)},
 copyright={Public Domain},
 address={Kopenhagen},
 howpublished={online},
 year={1878},
 publisher={Andr. Fred. Höst & Sohn},
 language={ger},
 title={Theorie der algebraischen Gleichungen},
 type={Text},
}