@misc{Timerding_Heinrich_Emil_(1873–1945)._Ed._Differenzenrechnung_1910,
 author={Timerding, Heinrich Emil (1873–1945). Ed.},
 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},
 title={Differenzenrechnung},
 type={Text},
 URL={http://www.rcin.org.pl/Content/92391/PDF/WA35_112077_5393_Differenzenrechnung.pdf},
}