@article{ARM_2010_46_2_a3,
     author = {Manfrin, Renato},
     title = {A note on linear perturbations of oscillatory second order differential equations},
     journal = {Archivum mathematicum},
     pages = {105--118},
     year = {2010},
     volume = {46},
     number = {2},
     mrnumber = {2684253},
     zbl = {1240.34186},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2010_46_2_a3/}
}