Editing Hyperbolic quaternion (section)

==References==
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*{{cite journal |author-link=Oliver Heaviside |first=Oliver |last=Heaviside  |title=On the forces, stresses, and fluxes of energy in the electromagnetic field |journal=Philosophical Transactions of the Royal Society of London A |volume=183 |pages=423–480 |year=1892 |doi= 10.1098/rsta.1892.0011|url= https://zenodo.org/record/1432100|jstor=90590 |bibcode=1892RSPTA.183..423H|doi-access=free }}
*{{cite journal |first=A. |last=Macfarlane |title=Principles of the Algebra of Physics |journal=Proceedings of the American Association for the Advancement of Science |volume=40 |pages=65–117 |year=1891 }}
*{{cite book |first=A. |last=Macfarlane |chapter=Paper 2: The Imaginary of the Algebra |title=Papers on Space Analysis |url=https://archive.org/details/cu31924001506769 |publisher=B. Westerman |location=New York |year=1894 |chapter-url=https://archive.org/details/principlesalgeb01macfgoog}}
*{{cite web |first=A. |last=Macfarlane |title=Space-Analysis: a brief of twelve lectures |date=1900 |publisher=[[Lehigh University]] |url=http://digital.lib.lehigh.edu/cdm4/eb_viewer.php?DMTHUMB=1&ptr=1088}}
*{{cite journal |first=A. |last=Macfarlane |title=Hyperbolic Quaternions |journal=Proceedings of the Royal Society of Edinburgh |volume=23 |pages=169–180 |date=January 1902 |doi=10.1017/S0370164600010385 |url=https://zenodo.org/record/2154076 }} [https://archive.org/details/proceedingsroya37edingoog Internet Archive] (free), or [https://books.google.com/books?id=-DhrXa1ZX38C&oe=UTF-8 Google Books] (free). (Note: P. 177 and figures plate incompletely scanned in free versions.)
*{{cite journal |author-link=G. B. Mathews |first=G.B.M. |last=Mathews  |title=An Algebra for Physicists |journal=Nature |volume=91 |issue=2284 |pages=595–6 |year=1913 |doi=10.1038/091595b0 |bibcode=1913Natur..91..595G |doi-access=free }}
* [https://web.archive.org/web/20091027012440/http://ca.geocities.com/macfarlanebio/hypquat.html Alexander Macfarlane and the Ring of Hyperbolic Quaternions]
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{{Number systems}}

[[Category:Non-associative algebra]]
[[Category:Historical treatment of quaternions]]
[[Category:Minkowski spacetime]]