@misc{Cayley_Arthur_(1821–1895)_Note_1892, author={Cayley Arthur (1821–1895)}, volume={5}, copyright={Public Domain}, address={Cambridge}, journal={The collected mathematical papers of Arthur Cayley}, howpublished={online}, year={1892}, publisher={Cambridge University Press}, language={eng}, type={Text}, title={Note on Lobatschewsky's Imaginary Geometry}, URL={http://rcin.org.pl./Content/129074/PDF/WA35_156122_12807-5_Art362.pdf}, }