1-4 of 4 Books

Riemannsche Hilbert-mannigfaltigkeiten; periodische geodätische
By P. Flaschel

An Introduction to the Analysis of Paths on a Riemannian Manifold (Mathematical Surveys & Monographs)
By Daniel W. Stroock

Sobolev spaces on Riemannian manifolds
By Emmanuel Hebey

Homogeneous structures on Riemannian manifolds
By F. Tricerri