@article{GDZPPN001164007,
title = {Comparison theorems for supremum norms.},
journal = {Numerische Mathematik},
volume = {4},
year = {1962},
pages = {15-20},
zbl = {0103.33103},
url = {http://dml.mathdoc.fr/item/GDZPPN001164007}
}
SCHNEIDER, H.; STRANG, W.G. Comparison theorems for supremum norms.. Numerische Mathematik, Tome 4 (1962) pp. 15-20. http://gdmltest.u-ga.fr/item/GDZPPN001164007/