Klein is deeply indebted to several members of the GA community and their work. Beyond the works cited here, the author stands of the shoulders of giants (Felix Klein, Sophus Lie, Arthur Cayley, William Rowan Hamilton, Julius Plücker, and William Kingdon Clifford, among others).
 Leo Dorst, Daniel Fontijne, Stephen Mann. (2007) Geometric Algebra for Computer Science. Burlington, MA: Morgan Kaufmann Publishers Inc.