@misc{Cayley_Arthur_(1821–1895)_A_1896,
 author={Cayley, Arthur (1821–1895)},
 volume={10},
 copyright={Public Domain},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1896},
 publisher={Cambridge University Press},
 language={eng},
 type={Text},
 title={A theorem on groups},
 URL={http://www.rcin.org.pl/impan/Content/143013/PDF/WA35_168917_12807-10_Art659.pdf},
}