@article{RLIN_2005_9_16_2_a2,
     author = {Berti, Massimiliano and Procesi, Michela},
     title = {Quasi-periodic oscillations for wave equations under periodic forcing},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {109--116},
     publisher = {mathdoc},
     volume = {Ser. 9, 16},
     number = {2},
     year = {2005},
     zbl = {1225.35146},
     mrnumber = {1614571},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_2005_9_16_2_a2/}
}