@article{AIHPC_1989__6_1_1_0,
     author = {Balabane, Mikhael},
     title = {On a regularizing effect of {Schr\"odinger} type groups},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1--14},
     publisher = {Gauthier-Villars},
     volume = {6},
     number = {1},
     year = {1989},
     mrnumber = {984145},
     zbl = {0699.35027},
     language = {en},
     url = {http://www.numdam.org/item/AIHPC_1989__6_1_1_0/}
}