@article{AIHPC_1986__3_4_285_0,
     author = {Gutkin, Eug\`ene},
     title = {Quantum nonlinear {Schr\"odinger} equation. {I.} {Intertwining} operators},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {285--314},
     publisher = {Gauthier-Villars},
     volume = {3},
     number = {4},
     year = {1986},
     mrnumber = {853384},
     zbl = {0614.35086},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1986__3_4_285_0/}
}