@misc{Cayley_Arthur_(1821–1895)_On_1896,
 author={Cayley Arthur (1821–1895)},
 volume={9},
 copyright={Public Domain},
 address={Cambridge},
 journal={The collected mathematical papers of Arthur Cayley},
 howpublished={online},
 year={1896},
 publisher={Cambridge University Press},
 language={eng},
 title={On the analytical forms called trees, with application to the theory of chemical combinations},
 type={Text},
 URL={http://rcin.org.pl/Content/121409/PDF/WA35_151176_12807-9_610.pdf},
}