@article{PM_1991_1991_1_a11,
     author = {Segovia, Carlos and Torrea, Jos\'e L.},
     title = {Desigualdades ponderadas para conmutadores de integrales fraccionales y singulares.},
     journal = {Publicacions matem\`atiques},
     pages = {209-235},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1991_1991_1_a11/}
}