@misc{Cayley_Arthur_(1821–1895)_On_1897,
 author={Cayley Arthur (1821–1895)},
 copyright={Domena Publiczna},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1897},
 publisher={Cambridge University Press},
 language={eng},
 type={Tekst},
 title={On the non-Euclidian plane geometry},
 URL={http://www.rcin.org.pl/Content/125347/PDF/WA35_153812_12807-12_Art29.pdf},
}