On the Elliptic-Hyperbolic Transition in Whitham Modulation Theory. - Thomas J. Bridges; Daniel J. Ratliff (SIAM J. Appl. Math., 2017)

Nonlinear Theory for Coalescing Characteristics in Multiphase Whitham Modulation Theory. - Thomas J. Bridges; Daniel J. Ratliff (J. Nonlinear Sci., 2021)

Kink-antikink stripe interactions in the two-dimensional sine-Gordon equation. - Ricardo Carretero-González; L. A. Cisneros-Ake; R. Decker; G. N. Koutsokostas; Dimitri J. Frantzeskakis; P. G. Kevrekidis; Daniel J. Ratliff (Commun. Nonlinear Sci. Numer. Simul., 2022)