1. Stable Mappings and Their Singularities, Graduate Texts in Mathematics, 14, Springer-Verlag, New York, 1973.
2. Calculus of Variations in the Large, Am. Math. Soc. Colloq. Publ., 18, 1934.
3. Lectures on Algebraic Topology, Benjamin, New York, 1966.
4. Algebraic Topology, McGraw-Hill, New York, 1966.
5. Thesis, University of Pau, Pau, France, 1979.