@article{GDZPPN002113538,
title = {The null condition and global existence of nonlinear elsastic waves.},
journal = {Inventiones mathematicae},
volume = {123},
year = {1996},
pages = {323-342},
zbl = {0844.73016},
url = {http://dml.mathdoc.fr/item/GDZPPN002113538}
}
Sideris, Thomas C. The null condition and global existence of nonlinear elsastic waves.. Inventiones mathematicae, Tome 123 (1996) pp. 323-342. http://gdmltest.u-ga.fr/item/GDZPPN002113538/