1. Baekler, P., Hehl, F.W., Mielke, E.W.: Nonmetricity and Torsion: Facts and Fancies in Gauge Approaches to Gravity. In: Ruffini, R. (ed.) Proceedings of 4th Marcel Grossmann Meeting on General Relativity, pp. 277–316. North-Holland, Amsterdam (1986)
2. Carroll, S.M.: Lecture Notes in Relativity [gr-qc/9712019] (1997)
3. Choquet-Bruhat, Y., DeWitt-Morette, C., Dillard-Bleick, M.: Analysis, Manifolds and Physics, revisited edn. North Holland, Amsterdam (1982)
4. Crumeyrolle, A.: Orthogonal and Symplectic Clifford Algebras. Kluwer Academic, Dordrecht (1990)
5. da Rocha, R., Rodrigues, W.A. Jr., Pair and impair, even and odd form fields and electromagnetism. Ann. Phys. 19, 6–34 (2010). arXiv:0811.1713v7 [math-ph]