@misc{Wertheim_Gustav_(1843–1902)_Elemente_1887,
 author={Wertheim, Gustav (1843–1902)},
 address={Leipzig},
 howpublished={online},
 year={1887},
 publisher={B.G.Teubner},
 language={ger},
 type={Text},
 title={Elemente der Zahlentheorie},
}