@misc{Sylvester_James_Joseph_(1814–1897)_On_1908, author={Sylvester, James Joseph (1814–1897)}, copyright={Public Domain}, address={Cambridge}, howpublished={online}, year={1908}, publisher={Cambridge University Press}, language={eng}, type={Text}, title={On an elementary proof and generalization of Sir Isaac Newton's hitherto undemonstrated Rule for the discovery of imaginary roots}, URL={http://rcin.org.pl./Content/115423/PDF/WA35_140228_11371-2_Art84.pdf}, }