@article{GDZPPN001250639, title = {On separation properties in semilattices.}, journal = {Semigroup forum}, volume = {11}, year = {1975}, pages = {220-228}, zbl = {0299.06002}, url = {http://dml.mathdoc.fr/item/GDZPPN001250639} }
Varlet, J.C. On separation properties in semilattices.. Semigroup forum, Tome 11 (1975) pp. 220-228. http://gdmltest.u-ga.fr/item/GDZPPN001250639/