@misc{Hamilton_William_Rowan_(1805–1865)_Letter_1967, author={Hamilton, William Rowan (1805–1865)}, volume={3}, copyright={Public Domain}, address={Cambridge}, journal={Cunningham Memoir}, howpublished={online}, year={1967}, publisher={University Press}, language={eng}, language={eng}, type={Text}, title={Letter to Graves on Quanternions; or on a new System of Imaginaries in Algebra (1843)}, URL={http://rcin.org.pl/Content/189921/PDF/WA35_223193_11536-3_art-4.pdf}, }