@article{GDZPPN002487721,
title = {Semilinear Hyperbolic Systems and Equations with Singular Initial Data.},
journal = {Monatshefte f\"ur Mathematik},
volume = {112},
year = {1991},
pages = {99-114},
zbl = {0747.35020},
url = {http://dml.mathdoc.fr/item/GDZPPN002487721}
}
Gramchev, Todor. Semilinear Hyperbolic Systems and Equations with Singular Initial Data.. Monatshefte für Mathematik, Tome 112 (1991) pp. 99-114. http://gdmltest.u-ga.fr/item/GDZPPN002487721/