@misc{Cayley_Arthur_(1821–1895)_Demonstration_1891, author={Cayley, Arthur (1821–1895)}, volume={4}, copyright={Public Domain}, address={Cambridge}, journal={Mathematical papers}, howpublished={online}, year={1891}, publisher={University Press}, language={eng}, type={Text}, title={Demonstration of a theorem in finite differences}, URL={http://www.rcin.org.pl/Content/125708/PDF/WA35_155261_12807-4_Demonstration-of-a.pdf}, }