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@article{AM2_1980__20_182377, author = {Martin Schechter}, title = {Wave operators for pairs of spaces and the {Klein-Gordon} equation.}, journal = {Aequationes mathematicae}, pages = {38--50}, publisher = {mathdoc}, volume = {20}, year = {1980}, zbl = {0444.47016}, url = {http://geodesic.mathdoc.fr/item/AM2_1980__20_182377/} }
Martin Schechter. Wave operators for pairs of spaces and the Klein-Gordon equation.. Aequationes mathematicae, Tome 20 (1980), pp. 38-50. http://geodesic.mathdoc.fr/item/AM2_1980__20_182377/