@misc{Cayley_Arthur_(1821–1895)_On_1893,
 author={Cayley Arthur (1821–1895)},
 volume={6},
 copyright={Public Domain},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1893},
 publisher={Cambridge University Press},
 language={eng},
 title={On the Conditions for the existence of three equal Roots, or of two pairs of equal Roots, of a Binary Quartic or Quintic},
 type={Text},
 URL={http://rcin.org.pl/Content/135178/PDF/WA35_165181_12807-6_Art409.pdf},
}