@misc{Cayley_Arthur_(1821–1895)_On_1897,
 author={Cayley Arthur (1821–1895)},
 copyright={Public Domain},
 address={Cambridge},
 journal={Mathematical papers},
 howpublished={online},
 year={1897},
 publisher={Cambridge University Press},
 language={eng},
 title={On the system of tree circles which cut each other at given angles and have their centres in a line},
 type={Text},
 URL={http://rcin.org.pl./Content/125412/PDF/WA35_154347_12807-12_Art77.pdf},
}