@article {Baldi2006257,
	title = {Periodic solutions of nonlinear wave equations for asymptotically full measure sets of frequencies},
	journal = {Atti della Accademia Nazionale dei Lincei, Classe di Scienze Fisiche, Matematiche e Naturali, Rendiconti Lincei Matematica e Applicazioni},
	volume = {17},
	number = {3},
	year = {2006},
	note = {cited By (since 1996)5},
	pages = {257-277},
	abstract = {We prove existence and multiplicity of small amplitude periodic solutions of completely resonant nonlinear wave equations with Dirichlet boundary conditions for asymptotically full measure sets of frequencies, extending the results of [7] to new types of nonlinearities.},
	issn = {11206330},
	author = {P Baldi and Massimiliano Berti}
}
