Yanheng Ding, Cheng Lee. Periodic Solutions of Hamiltonian Systems. SIAM J. Math. Analysis, 32(3):555-571, 2000. [doi]
@article{DingL00-3,
title = {Periodic Solutions of Hamiltonian Systems},
author = {Yanheng Ding and Cheng Lee},
year = {2000},
doi = {10.1137/S0036141099358178},
url = {http://dx.doi.org/10.1137/S0036141099358178},
researchr = {https://researchr.org/publication/DingL00-3},
cites = {0},
citedby = {0},
journal = {SIAM J. Math. Analysis},
volume = {32},
number = {3},
pages = {555-571},
}