@article{GDZPPN002204606,
title = {Uniqueness for first-order hyperbolic systems - with applications to secnd-order elliptic third-order and Maxwell's equations.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {187-196},
zbl = {0605.35051},
url = {http://dml.mathdoc.fr/item/GDZPPN002204606}
}
Racke, Reinhard. Uniqueness for first-order hyperbolic systems - with applications to secnd-order elliptic third-order and Maxwell's equations.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 187-196. http://gdmltest.u-ga.fr/item/GDZPPN002204606/