@article{BUMI_2004_8_7B_2_a16,
     author = {Berti, Massimiliano and Bolle, Philippe},
     title = {Bifurcation of free vibrations for completely resonant wave equations},
     journal = {Bollettino della Unione matematica italiana},
     pages = {519--528},
     publisher = {mathdoc},
     volume = {Ser. 8, 7B},
     number = {2},
     year = {2004},
     zbl = {1182.35166},
     mrnumber = {1819863},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2004_8_7B_2_a16/}
}