TY  - JOUR
AU  - Henry Helson
TI  - On the symmetric difference of sets as a group operation
JO  - Colloquium Mathematicum
PY  - 1947
SP  - 203
EP  - 205
VL  - 1
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-1-3-203-205/
DO  - 10.4064/cm-1-3-203-205
LA  - en
ID  - 10_4064_cm_1_3_203_205
ER  -