@misc{Cayley_Arthur_(1821–1895)_A_1890, author={Cayley, Arthur (1821–1895)}, volume={3}, copyright={Public Domain}, address={Cambridge}, journal={Mathematical papers}, howpublished={online}, year={1890}, publisher={Cambridge at the University Press}, language={eng}, type={Text}, title={A theorem relating to surfaces of the second ordes}, URL={http://www.rcin.org.pl/impan/Content/173237/PDF/WA35_184441_12807-3_art-26.pdf}, }