@misc{Hahn_Hans_(1879–1934)_Arithmetik,_1910,
 author={Hahn, Hans (1879–1934)},
 editor={Epstein, Paul (1871–1939). Ed.},
 editor={Timerding, Heinrich Emil (1873–1945). Ed.},
 editor={Pascal, Ernesto (1865–1940)},
 copyright={Public Domain},
 address={Leipzig ;},
 address={Berlin},
 howpublished={online},
 year={1910},
 publisher={B. G. Teubner},
 language={ger},
 type={Text},
 title={Arithmetik, Mengenlehre, Grundbegriffe der Fnnktionenlehre},
 URL={http://rcin.org.pl/Content/92288/PDF/WA35_112068_5393_Arithmetik.pdf},
}