Ito, Hidekazu. "Integrability of Hamiltonian systems and Birkhoff normal forms in the simple resonance case.." Mathematische Annalen 292.3 (1992): 411-444. <http://eudml.org/doc/164922>.
@article{Ito1992, author = {Ito, Hidekazu}, journal = {Mathematische Annalen}, keywords = {Birkhoff normal forms; analytic Hamiltonian systems; integrability; equilibrium point; simple resonance}, number = {3}, pages = {411-444}, title = {Integrability of Hamiltonian systems and Birkhoff normal forms in the simple resonance case.}, url = {http://eudml.org/doc/164922}, volume = {292}, year = {1992}, }
TY - JOUR AU - Ito, Hidekazu TI - Integrability of Hamiltonian systems and Birkhoff normal forms in the simple resonance case. JO - Mathematische Annalen PY - 1992 VL - 292 IS - 3 SP - 411 EP - 444 KW - Birkhoff normal forms; analytic Hamiltonian systems; integrability; equilibrium point; simple resonance UR - http://eudml.org/doc/164922 ER -