%0 Journal Article %A Teresa Alberico %A Andrea Cianchi %A Carlo Sbordone %T Fractional integrals and $ {A}_{p}$-weights: A sharp estimate %J Comptes Rendus. Mathématique %D 2009 %P 1265-1270 %V 347 %N 21-22 %I Elsevier %R 10.1016/j.crma.2009.09.001 %G en %F CRMATH_2009__347_21-22_1265_0