@article{1102993961,
author = {Sather, D.},
title = {Maximum and monotonicity properties of initial boundary value problems for hyperbolic equations.},
journal = {Pacific J. Math.},
volume = {19},
number = {3},
year = {1966},
pages = { 141-157},
language = {en},
url = {http://dml.mathdoc.fr/item/1102993961}
}
Sather, D. Maximum and monotonicity properties of initial boundary value problems for hyperbolic equations.. Pacific J. Math., Tome 19 (1966) no. 3, pp. 141-157. http://gdmltest.u-ga.fr/item/1102993961/