@misc{Sylvester_James_Joseph_(1814–1897)_On_1912,
 author={Sylvester, James Joseph (1814–1897)},
 copyright={Public Domain},
 address={Cambridge},
 howpublished={online},
 year={1912},
 publisher={Cambridge University Press},
 language={eng},
 title={On the number of fractions contained in any "Farey series" of which the limiting number is given},
 type={Text},
 URL={http://rcin.org.pl/Content/119618/PDF/WA35_145247_11371-4_Art9.pdf},
}