@misc{Cayley_Arthur_(1821–1895)_On_1896,
 author={Cayley, Arthur (1821–1895)},
 volume={10},
 copyright={Domena Publiczna},
 journal={Mathematical papers},
 address={Cambridge},
 howpublished={online},
 year={1896},
 publisher={Cambridge University Press},
 language={eng},
 type={Tekst},
 title={On a differential relation between the sides of a quadrangle},
 URL={http://rcin.org.pl./Content/142987/PDF/WA35_168899_12807-10_Art642.pdf},
}