TY  - JOUR
AU  - V. Balachandran
TI  - A characterization of ΣΔ-rings of subsets
JO  - Fundamenta Mathematicae
PY  - 1955
SP  - 38
EP  - 41
VL  - 41
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-41-1-38-41/
DO  - 10.4064/fm-41-1-38-41
LA  - en
ID  - 10_4064_fm_41_1_38_41
ER  -