@article{GDZPPN002218259,
title = {Regular Solutions of Initial-Boundary Value Problems for Linear and Nonlinear Wave - Equations I.},
journal = {Manuscripta mathematica},
volume = {12},
year = {1974},
pages = {187-206},
zbl = {0289.35053},
url = {http://dml.mathdoc.fr/item/GDZPPN002218259}
}
Wahl, Wolf von. Regular Solutions of Initial-Boundary Value Problems for Linear and Nonlinear Wave - Equations I.. Manuscripta mathematica, Tome 12 (1974) pp. 187-206. http://gdmltest.u-ga.fr/item/GDZPPN002218259/