@article{GDZPPN001261568, title = {The local semilattice of chains of idempotents.}, journal = {Semigroup forum}, volume = {44}, year = {1992}, pages = {157-163}, zbl = {0752.06002}, url = {http://dml.mathdoc.fr/item/GDZPPN001261568} }
Putcha, M.S.; Easdown, D. The local semilattice of chains of idempotents.. Semigroup forum, Tome 44 (1992) pp. 157-163. http://gdmltest.u-ga.fr/item/GDZPPN001261568/