SeAb1976
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H. Segur, M. Ablowitz, Asymptotic solutions and conservation laws for the nonlinear Schr\"odinger equation I. J. Math. Phys. 17 (1976), 710-713.
H. Segur, M. Ablowitz, Asymptotic solutions and conservation laws for the nonlinear Schr\"odinger equation I. J. Math. Phys. 17 (1976), 710-713.