1. M. Spivak, Calculus on Manifolds, (W. A. Benjamin, 1965).
  2. M. Spivak, A Comprehensive Introduction to Differential Geometry, Vol. 1, (1970).
  3. W. Boothby, An Introduction to Differentiable Manifolds and Riemannian Geometry, 2nd edition, (Academic Press, 1986).
  4. M. Berger and B. Gostiaux, Differential Geometry: Manifolds, Curves and Surfaces. Translated from the French by S. Levy, (Springer Graduate Texts in Mathematics, 115, Springer--Verlag (1988)) Chapters 0-3, 5-7.
  5. F. Warner, Foundations of Differentiable Manifolds and Lie Groups, (Springer Graduate Texts in Mathematics, 1994).
  6. D. Barden and C. Thomas, An Introduction to Differential Manifolds. (Imperial College Press, London, 2003.)
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