@article{GDZPPN002436108,
title = {On Space-Time Means and Strong Global Solutions of Nonlinear Hyperbolic Equations.},
journal = {Mathematische Zeitschrift},
volume = {202},
year = {1989},
pages = {45-56},
zbl = {0705.35082},
url = {http://dml.mathdoc.fr/item/GDZPPN002436108}
}
Brenner, Philip. On Space-Time Means and Strong Global Solutions of Nonlinear Hyperbolic Equations.. Mathematische Zeitschrift, Tome 202 (1989) pp. 45-56. http://gdmltest.u-ga.fr/item/GDZPPN002436108/