TY  - JOUR
AU  - Preston, G. B.
TI  - Any group is a maximal subgroup of the semigroup of binary relations on some set†
JO  - Glasgow mathematical journal
PY  - 1973
SP  - 21
EP  - 24
VL  - 14
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500001683/
DO  - 10.1017/S0017089500001683
ID  - 10_1017_S0017089500001683
ER  -