@misc{Cayley_Arthur_(1821–1895)_Supplementary_1890,
 author={Cayley, Arthur (1821–1895)},
 volume={3},
 copyright={Public Domain},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1890},
 publisher={Cambridge at the University Press},
 language={eng},
 title={Supplementary remarks on the porism of the in-and-circumscribed triangle},
 type={Text},
 URL={http://rcin.org.pl/Content/173698/PDF/WA35_185806_12807-3_art-44.pdf},
}