@incollection{JEDP_1993____A11_0,
     author = {Isozaki, Hiroshi},
     title = {A generalization of the radiation condition of {Sommerfeld} for $N$-body {Schr\"odinger} operators},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {11},
     pages = {1--9},
     publisher = {Ecole polytechnique},
     year = {1993},
     mrnumber = {94f:81172},
     language = {en},
     url = {http://archive.numdam.org/item/JEDP_1993____A11_0/}
}