TY  - JOUR
AU  - H. Griffiths
TI  - Borel sets and countable series of operations
JO  - Fundamenta Mathematicae
PY  - 1957
SP  - 115
EP  - 155
VL  - 44
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-44-2-115-155/
DO  - 10.4064/fm-44-2-115-155
LA  - en
ID  - 10_4064_fm_44_2_115_155
ER  -