@article{1195515796,
author = {Nishitani, Tatsuo},
title = {Energy inequality for non strictly hyperbolic operators in the Gevrey class},
journal = {Proc. Japan Acad. Ser. A Math. Sci.},
volume = {58},
number = {5},
year = {1982},
pages = { 429-431},
language = {en},
url = {http://dml.mathdoc.fr/item/1195515796}
}
Nishitani, Tatsuo. Energy inequality for non strictly hyperbolic operators in the Gevrey class. Proc. Japan Acad. Ser. A Math. Sci., Tome 58 (1982) no. 5, pp. 429-431. http://gdmltest.u-ga.fr/item/1195515796/