The local ill-posedness of the modified KdV equation
Annales de l'I.H.P. Analyse non linéaire, Volume 13 (1996) no. 4, p. 529-535 
@article{AIHPC_1996__13_4_529_0,
     author = {Birnir, Bj\"orn and Ponce, Gustavo and Svanstedt, Nils},
     title = {The local ill-posedness of the modified KdV equation},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     publisher = {Gauthier-Villars},
     volume = {13},
     number = {4},
     year = {1996},
     pages = {529-535},
     zbl = {0858.35130},
     mrnumber = {1404320},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1996__13_4_529_0}
}

Birnir, Björn; Ponce, Gustavo; Svanstedt, Nils. The local ill-posedness of the modified KdV equation. Annales de l'I.H.P. Analyse non linéaire, Volume 13 (1996) no. 4, pp. 529-535. http://www.numdam.org/item/AIHPC_1996__13_4_529_0/

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