1. V. Arnold Les Méthodes Mathématiques de la Mécanique Classique Mir: Moscou (Russian edition: 1974)§32–33, 1974
2. M. F. Atiyah, R. Bott and A.A. Shapiro Clifford Modules, Topology
3 (Supp.1)3–38, 1964
3. I.M. Benn and R.W. Tucker “The Dirac equation in exterior form” Commun. Math. Phys. 98, 53–63, 1985
4. W.H. Greub Multilinear Algebra Springer-Verlag: New York, 1967
5. D. Hestenes Space-Time Algebra Gordon and Breach: New York 1966