@article{MV_1957_9_3-4_a11,
     author = {M. Bertolino},
     title = {Proc\'ed\'es de l'encadrement des solutions des \'equations diff\'erentielles},
     journal = {Matemati\v{c}ki vesnik},
     pages = {261 },
     publisher = {mathdoc},
     volume = {9},
     number = {3-4},
     year = {1957},
     url = {http://geodesic.mathdoc.fr/item/MV_1957_9_3-4_a11/}
}