TY  - JOUR
AU  - Utz, W.R.
TI  - Some theorems and questions on matrices
JO  - Portugaliae mathematica
PY  - 1959
SP  - 225
EP  - 229
VL  - 18
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1959__18_4_114829/
LA  - en
ID  - PORMA_1959__18_4_114829
ER  -