@misc{Cayley_Arthur_(1821–1895)_[Addition_1896, author={Cayley, Arthur (1821–1895)}, volume={11}, copyright={Public Domain}, journal={Mathematical papers}, address={Cambridge}, howpublished={online}, year={1896}, publisher={Cambridge University Press}, language={eng}, language={eng}, type={Text}, title={[Addition to mr Spottiswoode's paper "on the twentyone coordinates of a conic space"]}, URL={http://rcin.org.pl./Content/147899/PDF/WA35_180811_12807-11_art-25.pdf}, }