Classical Riemannian Geometry references:
- Do Carmo Riemannian Geometry Birkhauser (Springer) 1992
- O'Neill Semi-Riemannian Geometry with applications to relativity
Academic Press 1983
- Gallot, Hulin & Lafontaine Riemannian Geometry Springer 2004
- Lee Riemannian Manifolds: An introduction to curvature Springer 1997
- Berger A panoramic view of Riemannian Geometry Springer 2003
- Jost Riemannian Geometry and Geometric Analyis Springer 1998
- Cheeger & Ebin Comparison Theorems in Riemannian geometry
North-Holland 1975
- Chavel Riemannian Geometry: A modern introduction
Cambridge Univ. Press 1993