1. ; Lectures on the Morse complex for infinite dimensional manifolds. Morse theoretic methods in non-linear analysis and symplectic topology (Montreal). Edited by , and . In press.
2. Pure and Appl;Adams,1975
3. Periodic solutions of Lagrangian systems on a compact manifold
4. Morse theory, graphs, and string topology. Morse theoretic methods in non-linear analysis and symplectic topology (Montreal). Edited by , and . In press. Available at arXiv:math.GT/0411272 (2004).