1. Abraham, R., Marsden, J.E., Ratiu, T., Manifolds, Tensor Analysis, and Applications, 2nd ed., Applied Mathematical Sciences 75, Springer, New York, 1988.
2. Cartan, H., Differential Forms, Hermann, Paris; Houghton Mifflin, Boston, 1970.
3. Darling, R.W.R., Differential Forms and Connections, Cambridge University Press, London, 1994.
4. do Carmo, M.P., Differential Forms and Applications, Springer-Verlag, Berlin, 1994.
5. Flanders, H., Differential Forms with Applications to the Physical Sciences, Dover, New York, 1989.