TY  - JOUR
AU  - Joe Howard
TI  - ℱ-singular and G-cosingular operators
JO  - Colloquium Mathematicum
PY  - 1970
SP  - 85
EP  - 89
VL  - 22
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-22-1-85-89/
DO  - 10.4064/cm-22-1-85-89
LA  - en
ID  - 10_4064_cm_22_1_85_89
ER  -