@misc{Cayley_Arthur_(1821–1895)_On_1894,
 author={Cayley, Arthur (1821–1895)},
 volume={7},
 copyright={Public Domain},
 journal={Mathematical papers},
 address={Cambridge},
 howpublished={online},
 year={1894},
 publisher={Cambridge University Press},
 language={eng},
 type={Text},
 title={On the variations of the position of the Orbit in the Planetary Theory},
 URL={http://rcin.org.pl/impan/Content/148117/PDF/WA35_178311_12807-7_Art68.pdf},
}