References on Differential Geometry

Needham, T., “VISUAL DIFFERENTIAL GEOMETRY and FORMS”, Princeton University Press, 2021

Spivak, M. — A Comprehensive Introduction to Differential Geometry, Vol. 1

Spivak, M. — Calculus on Manifolds - A Modern Approach to Classical Theorems of Advanced Calculus (1998)

Bachman, B. — A Geometric Approach to Differential Forms

Tu, L. W. — An Introduction to Manifolds

Boothby, W. M. — An Introduction to Differentiable Manifolds and Riemannian Geometry

Bourbaki, N. — Variétés différentielles et analytiques

Godinho, L.; Natario, J. — An Introduction to Riemannian Geometry

Lee, John M. - Introduction to Smooth Manifolds