@article{PM_2003_2003_1_a20,
     author = {Hofmann, Steve and Martell, Jos\'e Mar{\'\i}a},
     title = {Cotas {Lp} para transformadas de {Riesz} y ra{\'\i}ces cuadradas asociadas a operadores el{\'\i}pticos de segundo orden.},
     journal = {Publicacions matem\`atiques},
     pages = {497-515},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_2003_2003_1_a20/}
}