Multi-linear operators given by singular multipliers (with T. Tao and C. Thiele), J. Amer. Math. Soc. 15 (2002), 469–496.
The bi-Carleson operator (with T. Tao and C. Thiele), GAFA 16 (2006), 230277.
L^p estimates for the biest I & II (with T. Tao and C. Thiele), Math. Ann. 329 (2004), 401–426 and 427–461.
Bi-parameter paraproducts (with J. Pipher, T. Tao, and C. Thiele), Acta Math. 193 (2004), 269–296.
Paraproducts with flag singularities I. A case study, Rev. Mat. Iberoamericana 23 (2007), 705–742.