Variational and penalization methods for studying connecting orbits of Hamiltonian systems. Chen, Chao-Nien; Tzeng, Shyuh-yaur — 2000 Electronic Journal of Differential Equations (EJDE) [electronic only]
Some properties of Palais-Smale sequences with applications to elliptic boundary-value problems. Chen, Chao-Nien; Tzeng, Shyuh-yaur — 1999 Electronic Journal of Differential Equations (EJDE) [electronic only]
Existence and multiplicity results for homoclinic orbits of Hamiltonian systems. Chen, Chao-Nien; Tzeng, Shyuh-yaur — 1997 Electronic Journal of Differential Equations (EJDE) [electronic only]