TY  - JOUR
AU  - Strang, Gilbert
TI  - The Nucleus of a Set
JO  - Canadian mathematical bulletin
PY  - 1968
SP  - 65
EP  - 72
VL  - 11
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-009-8/
DO  - 10.4153/CMB-1968-009-8
ID  - 10_4153_CMB_1968_009_8
ER  -