@misc{Erdmann_Benno_(1851–1921)_Die_1877,
 author={Erdmann, Benno (1851–1921)},
 copyright={Public Domain},
 address={Leipzig},
 howpublished={online},
 year={1877},
 publisher={Verlag von Leopold Voss},
 language={ger},
 title={Die Axiome der Geometrie : eine philosophische Untersuchung der Riemann-Helmholtz'schen Raumtheorie},
 type={Text},
 URL={http://rcin.org.pl/Content/66712/PDF/WA35_20442_6425_Die-Axiome.pdf},
}