@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},
 type={Text},
 title={On the solution of a class of equations in quaternions},
 URL={http://www.rcin.org.pl/Content/121889/PDF/WA35_145279_11371-4_Art32.pdf},
}