四元数
65. http://dlxs2.library.cornell.edu/cgi/t/text/pageviewer-idx?c=math;cc=math;q1=right%20quaternion;rgn=full%20text;idno=05140001;didno=05140001;view=image;seq=81
↑ “quaternion group”. Wolframalpha.com. 2011年2月26日閲覧。
↑ Vector Analysis. Gibbs-Wilson. (1901). p. 428. https://books.google.com/?id=RC8PAAAAIAAJ&printsec=frontcover&dq=right+tensor+dyadic#PPA428,M1
↑ Wolframalpha.com
↑ ハミルトン (1899). Elements of Quaternions (2nd ed.). p. 244. ISBN 1-108-00171-8
↑ Lce.hut.fi
↑ Quaternions and Geometric Algebra. Accessed 2008-09-12. See also: Leo Dorst, Daniel Fontijne, Stephen Mann, (2007), Geometric Algebra For Computer Science, Morgan Kaufmann. ISBN 0-12-369465-5