@misc{Cayley_Arthur_(1821–1895)_[Addition_1896,
 author={Cayley, Arthur (1821–1895)},
 volume={11},
 copyright={Public Domain},
 journal={Mathematical papers},
 address={Cambridge},
 howpublished={online},
 year={1896},
 publisher={Cambridge University Press},
 language={eng},
 language={eng},
 type={Text},
 title={[Addition to mr Spottiswoode's paper "on the twentyone coordinates of a conic space"]},
 URL={http://rcin.org.pl./Content/147899/PDF/WA35_180811_12807-11_art-25.pdf},
}