@article{GDZPPN001252445, title = {Endomorphism semigroups of Brouwerian semilattices.}, journal = {Semigroup forum}, volume = {14}, year = {1977}, pages = {229-234}, zbl = {0381.06016}, url = {http://dml.mathdoc.fr/item/GDZPPN001252445} }
Köhler, P. Endomorphism semigroups of Brouwerian semilattices.. Semigroup forum, Tome 14 (1977) pp. 229-234. http://gdmltest.u-ga.fr/item/GDZPPN001252445/