@article{AIHPA_1990__52_2_163_0,
     author = {Hayashi, Nakao and Saitoh, Saburou},
     title = {Analyticity and smoothing effect for the {Schr\"odinger} equation},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {163--173},
     publisher = {Gauthier-Villars},
     volume = {52},
     number = {2},
     year = {1990},
     mrnumber = {1051235},
     zbl = {0731.35047},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1990__52_2_163_0/}
}