TY  - JOUR
AU  - Mura, Roberta Botto
TI  - Radical Classes need not have a Unique Maximal R 0-Closed Subclass
JO  - Canadian mathematical bulletin
PY  - 1974
SP  - 597
EP  - 598
VL  - 17
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-107-7/
DO  - 10.4153/CMB-1974-107-7
ID  - 10_4153_CMB_1974_107_7
ER  -