Ablowitz, M. J.; Benney, D. J. (1970). "The Evolution of Multi-Phase Modes for Nonlinear Dispersive Waves". Studies in Applied Mathematics. 49 (3): 225–238. doi:10.1002/sapm1970493225. ISSN0022-2526.
Ablowitz, M. J.; Benney, D. J. (1970). "The Evolution of Multi-Phase Modes for Nonlinear Dispersive Waves". Studies in Applied Mathematics. 49 (3): 225–238. doi:10.1002/sapm1970493225. ISSN0022-2526.