@article{EJDE_2001__2001__a225,
     author = {Furi, Massimo and Pera, Maria Patrizia and Spadini, Marco},
     title = {Multiplicity of forced oscillations for scalar differential equations},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2001},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2001__2001__a225/}
}