1. Introduction to Differentiable Manifolds, Interscience Publishers, New York, 1962.
2. and , A Generalized Morse Theory, Reprint, Brandeis and Columbia Universities, 1962.
3. and , Methodes topologiques dans les problèmes variationels, Gautheir-Villars, Paris, 1934.
4. Lectures on Morse Theory, Lecture Notes, Brandies and Harvard Universities, 1962.
5. Homotopical nilpotency