@article{PM_1993_1993_1_a3,
     author = {D\'etraz, Jacqueline},
     title = {Propiedades de media para las soluciones de sistemas el{\'\i}pticos},
     journal = {Publicacions matem\`atiques},
     pages = {83-89},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1993},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PM_1993_1993_1_a3/}
}