@article {Berti2008247,
	title = {Cantor families of periodic solutions of wave equations with C k nonlinearities},
	journal = {Nonlinear Differential Equations and Applications},
	volume = {15},
	number = {1-2},
	year = {2008},
	note = {cited By (since 1996)10},
	pages = {247-276},
	abstract = {We prove bifurcation of Cantor families of periodic solutions for wave equations with nonlinearities of class C k . It requires a modified Nash-Moser iteration scheme with interpolation estimates for the inverse of the linearized operators and for the composition operators. {\textcopyright} 2008 Birkhaueser.},
	issn = {10219722},
	doi = {10.1007/s00030-007-7025-5},
	author = {Massimiliano Berti and Philippe Bolle}
}
