1. R. Abraham and J. E. Marsden , Foundations of mechanics, Advanced Book Program, 2nd edn (Benjamin/Cummings Publishing Co., Inc., Reading, MA, 1978). Revised and enlarged, with the assistance of Tudor Raţiu and Richard Cushman.
2. Some remarks on flows of line elements and frames;Arnol'd;Dokl. Akad. Nauk SSSR,1961
3. The contact property for symplectic magnetic fields on
4. From one Reeb orbit to two;Cristofaro-Gardiner;J. Differ. Geom.,2016
5. Periodic points of Hamiltonian surface diffeomorphisms