@article{ASNSP_1998_4_26_1_185_0,
     author = {Tataru, Daniel},
     title = {On the regularity of boundary traces for the wave equation},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {185--206},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 26},
     number = {1},
     year = {1998},
     mrnumber = {1633000},
     zbl = {0932.35136},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1998_4_26_1_185_0/}
}