@article{10_4153_S0008439520000946,
     author = {Tao, Xiangxing and Hu, Guoen},
     title = {An estimate for the composition of rough singular integral operators},
     journal = {Canadian mathematical bulletin},
     pages = {911--922},
     year = {2021},
     volume = {64},
     number = {4},
     doi = {10.4153/S0008439520000946},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000946/}
}