@misc{Cayley_Arthur_(1821–1895)_On_1896, author={Cayley, Arthur (1821–1895)}, volume={10}, copyright={Public Domain}, address={Cambridge}, journal={Mathematical papers}, howpublished={online}, year={1896}, publisher={Cambridge University Press}, language={eng}, title={On the addition of the double ϑ-functions}, type={Text}, URL={http://rcin.org.pl/Content/143396/PDF/WA35_175813_12807-10_Art703.pdf}, }