@article{GDZPPN001164090, title = {Best possible ratios of certain matrix norms.}, journal = {Numerische Mathematik}, volume = {4}, year = {1962}, pages = {114-116}, zbl = {0104.34503}, url = {http://dml.mathdoc.fr/item/GDZPPN001164090} }
STONE, B.J. Best possible ratios of certain matrix norms.. Numerische Mathematik, Tome 4 (1962) pp. 114-116. http://gdmltest.u-ga.fr/item/GDZPPN001164090/