@article{1270043465,
author = {TANIGUCHI, Masaru},
title = {A Sharp Symmetrization of the $L^2$-Well-Posed Mixed Problem for Regularly Hyperbolic Equations of Second Order},
journal = {Tokyo J. of Math.},
volume = {18},
number = {2},
year = {1995},
pages = { 285-302},
language = {en},
url = {http://dml.mathdoc.fr/item/1270043465}
}
TANIGUCHI, Masaru. A Sharp Symmetrization of the $L^2$-Well-Posed Mixed Problem for Regularly Hyperbolic Equations of Second Order. Tokyo J. of Math., Tome 18 (1995) no. 2, pp. 285-302. http://gdmltest.u-ga.fr/item/1270043465/