1. Lectures of Smale on Differential Topology;Abraham,1962
2. Foundations of Modern Analysis;Dieudonne,1960
3. J. Franks: Necessary Conditions for Stability of Diffeomorphisms, to appear in Trans. Am. math. Soc.
4. Stable Manifolds for Hyperbolic Sets;Hirsch,1970
5. Introduction to Differentiable Manifolds;Lang,1962