Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1991__43_3_135096, author = {M. Breen}, title = {A maximal chain of principal ideals in the semigroup of binary relations on a finite set.}, journal = {Semigroup forum}, pages = {63--76}, publisher = {mathdoc}, volume = {43}, number = {3}, year = {1991}, zbl = {0727.20040}, url = {http://geodesic.mathdoc.fr/item/SF_1991__43_3_135096/} }
M. Breen. A maximal chain of principal ideals in the semigroup of binary relations on a finite set.. Semigroup forum, Tome 43 (1991) no. 3, pp. 63-76. http://geodesic.mathdoc.fr/item/SF_1991__43_3_135096/