@article {FONDA20171064,
	title = {An avoiding cones condition for the Poincar{\'e}{\textendash}Birkhoff Theorem},
	journal = {Journal of Differential Equations},
	volume = {262},
	number = {2},
	year = {2017},
	pages = {1064 - 1084},
	abstract = {<p>We provide a geometric assumption which unifies and generalizes the conditions proposed in [11], [12], so to obtain a higher dimensional version of the Poincar{\'e}{\textendash}Birkhoff fixed point Theorem for Poincar{\'e} maps of Hamiltonian systems.</p>},
	keywords = {Avoiding cones condition, Hamiltonian systems, Periodic solutions, Poincar{\'e}{\textendash}Birkhoff theorem},
	issn = {0022-0396},
	doi = {https://doi.org/10.1016/j.jde.2016.10.002},
	url = {http://www.sciencedirect.com/science/article/pii/S0022039616303278},
	author = {Alessandro Fonda and Paolo Gidoni}
}
