@article{NUMA_1962__4_131520,
     author = {B.J. STONE},
     title = {Best possible ratios of certain matrix norms.},
     journal = {Numerische Mathematik},
     pages = {114--116},
     publisher = {mathdoc},
     volume = {4},
     year = {1962},
     zbl = {0104.34503},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1962__4_131520/}
}