@article{GDZPPN002104458,
title = {Scattering frequencies and Gevrey 3 singularities.},
journal = {Inventiones mathematicae},
volume = {88},
year = {1987},
pages = {77-114},
zbl = {0723.35058},
url = {http://dml.mathdoc.fr/item/GDZPPN002104458}
}
Bardos, C.; Lebeau, G.; Rauch, J. Scattering frequencies and Gevrey 3 singularities.. Inventiones mathematicae, Tome 88 (1987) pp. 77-114. http://gdmltest.u-ga.fr/item/GDZPPN002104458/