@misc{Cayley_Arthur_(1821–1895)_On_1895,
 author={Cayley, Arthur (1821–1895)},
 copyright={Public Domain},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1895},
 publisher={Cambridge University Press},
 language={eng},
 title={On the porism of the in-and-circumscribed polygon, and the (2, 2) correspondence of points on a conic},
 type={Text},
 URL={http://www.rcin.org.pl/Content/135276/PDF/WA35_168027_12807-8_Art4.pdf},
}