Berti, Massimiliano Nonlinear oscillations of Hamiltonian PDEs Massimiliano Berti - Boston Birkhauser 2007 - xiv, 180 p ill 25 cm - Progress in nonlinear differential equations and their applications v. 74 . Contine bibliogr. si index ISBN: 9780817646806 0817646809 LCCN: 2007932361 Subjects--Topical Terms: Hamiltonian operatorDifferential equations, Partial