%0 Journal Article %A Tao, Xiangxing %A Hu, Guoen %T An estimate for the composition of rough singular integral operators %J Canadian mathematical bulletin %D 2021 %P 911-922 %V 64 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000946/ %R 10.4153/S0008439520000946 %F 10_4153_S0008439520000946