@article{10_1017_S0017089507003850,
     author = {CAMMAROTO, F. and CHINN\`I, A. and BELLA, B. DI},
     title = {MULTIPLICITY {RESULTS} {FOR} {A} {PERTURBED} {NONLINEAR} {SCHR\"ODINGER} {EQUATION}},
     journal = {Glasgow mathematical journal},
     pages = {423--429},
     year = {2007},
     volume = {49},
     number = {3},
     doi = {10.1017/S0017089507003850},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089507003850/}
}