@article{AIHPC_1985__2_1_67_0,
     author = {Gutkin, Eug\`ene},
     title = {Conservation laws for the nonlinear {Schr\"odinger} equation},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {67--74},
     publisher = {Gauthier-Villars},
     volume = {2},
     number = {1},
     year = {1985},
     mrnumber = {781592},
     zbl = {0585.35080},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPC_1985__2_1_67_0/}
}