1. Ambrosetti, A., Critical Points and Nonlinear Variational Problems, Mémoire 49, Soc. Math. de France, 1992.
2. Ambrosetti, A., Elliptic equations with jumping nonlinearities, J. Math. Phys. Sci. (Madras), 1984, 1–10.
3. Ambrosetti, A. and M. L. Bertotti, Homoclinics for second order conservative systems, Proc. Conf. in honor of L. Nirenberg, to appear.
4. Ambrosetti, A., V. Benci, and Y. Long, A note on the existence of multiple brake orbits, to appear in Nonlinear Analysis: TMA.
5. Ambrosetti, A. and V. Coti Zelati, Multiple homoclinic orbits for a class of conservative systems, preprint.