TY  - JOUR
AU  - M. Breen
TI  - A maximal chain of principal ideals in the semigroup of binary relations on a finite set.
JO  - Semigroup forum
PY  - 1991
SP  - 63
EP  - 76
VL  - 43
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1991__43_3_135096/
ID  - SF_1991__43_3_135096
ER  -