@misc{Sylvester_James_Joseph_(1814–1897)_Note_1908,
 author={Sylvester, James Joseph (1814–1897)},
 copyright={Public Domain},
 address={Cambridge},
 howpublished={online},
 year={1908},
 publisher={Cambridge University Press},
 language={eng},
 title={Note on the properties of the test operators which occur in the Calculus of Invariants, their derivatives, analogues, and laws of combination; [...]},
 type={Text},
 URL={http://rcin.org.pl/Content/115432/PDF/WA35_140247_11371-2_Art92.pdf},
}