@article{NUMA_1970__16_132018,
     author = {E. DEUTSCH},
     title = {Matricial {Norms.}},
     journal = {Numerische Mathematik},
     pages = {73--84},
     year = {1970},
     volume = {16},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__16_132018/}
}