@misc{Cayley_Arthur_(1821–1895)_On_1893-1894, author={Cayley, Arthur (1821–1895)}, volume={XXIII}, editor={Glaisher, James Whitbread Lee (1848–1928)}, copyright={Public Domain}, address={London ;}, address={Cambridge}, journal={The Messenger of Mathematics}, howpublished={online}, year={1893-1894}, publisher={Macmillan and Co.}, language={eng}, language={eng}, type={Text}, title={On the nine-points circle}, URL={http://www.rcin.org.pl/Content/109409/PDF/WA35_88012_cz294-1894-t23_Art5.pdf}, }