@article {fonda2016periodic,
	title = {Periodic perturbations of Hamiltonian systems},
	journal = {Advances in Nonlinear Analysis},
	volume = {5},
	number = {4},
	year = {2016},
	pages = {367{\textendash}382},
	publisher = {De Gruyter},
	abstract = {<p>We prove existence and multiplicity results for periodic solutions of Hamiltonian systems, by the use of a higher dimensional version of the Poincar{\'e}{\textendash}Birkhoff fixed point theorem. The first part of the paper deals with periodic perturbations of a completely integrable system, while in the second part we focus on some suitable global conditions, so to deal with weakly coupled systems.</p>},
	doi = {10.1515/anona-2015-0122},
	author = {Alessandro Fonda and Maurizio Garrione and Paolo Gidoni}
}
@article {FONDA201573,
	title = {A permanence theorem for local dynamical systems},
	journal = {Nonlinear Analysis: Theory, Methods \& Applications},
	volume = {121},
	year = {2015},
	note = {Nonlinear Partial Differential Equations, in honor of Enzo Mitidieri for his 60th birthday},
	pages = {73 - 81},
	abstract = {<p>We provide a necessary and sufficient condition for permanence related to a local dynamical system on a suitable topological space. We then present an illustrative application to a Lotka{\textendash}Volterra predator{\textendash}prey model with intraspecific competition.</p>},
	keywords = {Lotka{\textendash}Volterra, permanence, Predator{\textendash}prey, Uniform persistence},
	issn = {0362-546X},
	doi = {https://doi.org/10.1016/j.na.2014.10.011},
	url = {http://www.sciencedirect.com/science/article/pii/S0362546X14003332},
	author = {Alessandro Fonda and Paolo Gidoni}
}
