TY  - JOUR
AU  - Hoffmann, Rudolf-E.
TI  - Essential Extensions of T1-Spaces
JO  - Canadian mathematical bulletin
PY  - 1981
SP  - 237
EP  - 240
VL  - 24
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1981-037-1/
DO  - 10.4153/CMB-1981-037-1
ID  - 10_4153_CMB_1981_037_1
ER  -