@article{ARM_2002_38_1_a5,
     author = {Jaro\v{s}, J. and Kusano, T. and Yoshida, N.},
     title = {Generalized {Picone's} formula and forced oscillations in quasilinear differential equations of the second order},
     journal = {Archivum mathematicum},
     pages = {53--59},
     year = {2002},
     volume = {38},
     number = {1},
     mrnumber = {1899568},
     zbl = {1087.34014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_2002_38_1_a5/}
}