TY  - JOUR
AU  - Zorzitto, Frank
TI  - Purity And Copurity in Systems of Linear Transformations
JO  - Canadian journal of mathematics
PY  - 1976
SP  - 889
EP  - 896
VL  - 28
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-086-7/
DO  - 10.4153/CJM-1976-086-7
ID  - 10_4153_CJM_1976_086_7
ER  -