@article{PPN481110151_0003+dmdlog12,
title = {Hyperbolic Perturbation Problems Involving Time Derivatives on the Boundars.},
journal = {Forum mathematicum},
volume = {3},
year = {1991},
pages = {205-218},
zbl = {0738.35005},
url = {http://dml.mathdoc.fr/item/PPN481110151_0003+dmdlog12}
}
Colli, P.; Rodriques, José-Francisco. Hyperbolic Perturbation Problems Involving Time Derivatives on the Boundars.. Forum mathematicum, Tome 3 (1991) pp. 205-218. http://gdmltest.u-ga.fr/item/PPN481110151_0003+dmdlog12/