TY  - JOUR
AU  - J. Oxtoby
TI  - The kernel operation on subsets of a $T_1$-space
JO  - Fundamenta Mathematicae
PY  - 1975
SP  - 275
EP  - 284
VL  - 90
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm-90-3-275-284/
DO  - 10.4064/fm-90-3-275-284
LA  - en
ID  - 10_4064_fm_90_3_275_284
ER  -