@incollection{JEDP_1988____A14_0,
     author = {Balslev, Erik and Skibsted, Erik},
     title = {Resonance functions of two-body {Schr\"odinger} operators},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {14},
     pages = {1--12},
     publisher = {Ecole polytechnique},
     year = {1988},
     zbl = {0679.35075},
     language = {en},
     url = {http://archive.numdam.org/item/JEDP_1988____A14_0/}
}