@article{RSMUP_1994__91__65_0,
author = {d'Ancona, Piero},
title = {Well posedness in $C^\infty $ for a weakly hyperbolic second order equation},
journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
volume = {92},
year = {1994},
pages = {65-83},
zbl = {0820.35097},
language = {en},
url = {http://dml.mathdoc.fr/item/RSMUP_1994__91__65_0}
}
D'Ancona, Piero. Well posedness in $C^\infty $ for a weakly hyperbolic second order equation. Rendiconti del Seminario Matematico della Università di Padova, Tome 92 (1994) pp. 65-83. http://gdmltest.u-ga.fr/item/RSMUP_1994__91__65_0/
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