BirKnPoSvVe1996

B. Birnir, C. Kenig, G. Ponce, N. Svanstedt, L. Vega. On the ill-posedness of the IVP for the generalized Korteweg-de Vries and nonlinear Schrödinger equations. J. London Math. Soc. (2), 53 (1996), 551-559. MathSciNet, arXiv.