@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},
 type={Text},
 title={On a theorem in covariants},
 URL={http://www.rcin.org.pl/Content/135344/PDF/WA35_168108_12807-8_Art42.pdf},
}