Bibliografia
Principal
- Differential Forms in Algebraic Topology: R. Bott e L. Tu 1986 Springer-Verlag
- Differential Topology: M. Hirsch 1976 Springer-Verlag
- Foundations of Differential Geometry: S. Kobayashi e K. Nomizu 1996 John Wiley & Sons, Vol. I and II
- A Comprehensive Introduction to Differential Geometry: M. Spivak 1979 Publish or Perish, Inc.
- Foundations of Differentiable Manifolds and Lie Groups: F. Warner 1983 Springer-Verlag