@misc{Sylvester_James_Joseph_(1814–1897)_A_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={A new proof that a general quadric may be reduced to its canonical form (that is, a linear function of squares) by means of a real orthogonal substitution},
 URL={http://rcin.org.pl/Content/122686/PDF/WA35_145323_11371-4_Art66.pdf},
}