- A local well-posedness result for the quasilinear wave equation in R^{2+1} (Ph.D. thesis, Princeton 2002, extended version), Comm. Partial Differential Equations 29 (2004), 323-360 (short version).

- An analysis of recursively defined continuous functions (with Marcello Magno), Proceedings of the UCLEADS Symposium, UCLA (2004).

- Dispersive estimates for wave equations with rough coefficients (with Daniel Tataru), Comm. Partial Differential Equations 30 (2005), 849-880.

- Universal microfluidic gradient generator (with Daniel Irimia and Mehmet Toner), Anal. Chem. 78 (2006), 3472-3477.

- A phase space transform adapted to the wave equation (with Daniel Tataru), Comm. Partial Differential Equations 32 (2007), 1065-1101.

- Gradient NLW on curved background in 4+1 dimensions (with Daniel Tataru), Internat. Math. Res. Notices 2008 (2008), rnn108-58.

- A remark on an equation of wave maps type with variable coefficients, Math. Res. Lett. 16 (2009), 395-404.

- A continuity argument for a semilinear Skyrme model (with Sarada Rajeev), Electron. J. Differential Equations 2010 (2010), No. 86, 1-9.

- Nonconcentration of energy for a semilinear Skyrme model (with Sarada Rajeev), Ann. Physics 325 (2010), 2697-2706.

- Global well-posedness and scattering for Skyrme wave maps (with Kenji Nakanishi and Sarada Rajeev), Commun. Pure Appl. Anal. 11 (2012), 1923-1933.

- On the regularity of the 2+1-dimensional equivariant Skyrme model (with Daniel da Silva), Proc. Amer. Math. Soc. 141 (2013), 2105-2115.

- Restricted convolution inequalities, multilinear operators and applications (with Allan Greenleaf, Alex Iosevich, Eyvindur Palsson, and Eric Sawyer), Math. Res. Lett. 20 (2013), 675-694.

- Ill-posedness results for generalized Boussinesq equations (with A. Alexandrou Himonas and David Karapetyan), Nonlinear Anal. 95 (2014), 404-413.

- Sharp global regularity for the 2+1-dimensional equivariant Faddeev model (with Kenji Nakanishi and Xiang Zhang), Int. Math. Res. Not. 2015 (2015), rnv037-17.

- Large data global regularity for the classical equivariant Skyrme model (with Manoussos G. Grillakis) (2017).

- Large data global regularity for the 2+1-dimensional equivariant Faddeev model (with Manoussos G. Grillakis) (2017).