@article{EJDE_2003__2003__a127,
     author = {Spadini, Marco},
     title = {Harmonic solutions to perturbations of periodic separated variables {ODEs} on manifolds},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2003},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a127/}
}