@misc{Cayley_Arthur_(1821–1895)_On_1896,
 author={Cayley, Arthur (1821–1895)},
 volume={11},
 copyright={Public Domain},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1896},
 publisher={Cambridge University Press},
 language={eng},
 language={eng},
 type={Text},
 title={On the analytical forms called trees},
 URL={http://www.rcin.org.pl/Content/152694/PDF/WA35_181484_12807-11_art-67.pdf},
}