@article{MAN_1994__298_2_165186,
     author = {Nakao Hayashi and Tohru Ozawa},
     title = {Modified wave operators for the derivative nonlinear {Schr\"odinger} equation.},
     journal = {Mathematische Annalen},
     pages = {557--576},
     publisher = {mathdoc},
     volume = {298},
     number = {2},
     year = {1994},
     zbl = {0791.35124},
     url = {http://geodesic.mathdoc.fr/item/MAN_1994__298_2_165186/}
}