@article{CRMATH_2009__347_21-22_1265_0, author = {Teresa Alberico and Andrea Cianchi and Carlo Sbordone}, title = {Fractional integrals and $ {A}_{p}$-weights: {A} sharp estimate}, journal = {Comptes Rendus. Math\'ematique}, pages = {1265--1270}, publisher = {Elsevier}, volume = {347}, number = {21-22}, year = {2009}, doi = {10.1016/j.crma.2009.09.001}, language = {en}, }