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@article{IM_1987__90_143501, author = {C. Bardos and G. Lebeau and J. Rauch}, title = {Scattering frequencies and {Gevrey} 3 singularities.}, journal = {Inventiones mathematicae}, pages = {77--114}, publisher = {mathdoc}, volume = {90}, year = {1987}, zbl = {0723.35058}, url = {http://geodesic.mathdoc.fr/item/IM_1987__90_143501/} }
C. Bardos; G. Lebeau; J. Rauch. Scattering frequencies and Gevrey 3 singularities.. Inventiones mathematicae, Tome 90 (1987), pp. 77-114. http://geodesic.mathdoc.fr/item/IM_1987__90_143501/