@article{SF_1975__10_134114,
     author = {J.C. Varlet},
     title = {On separation properties in semilattices.},
     journal = {Semigroup forum},
     pages = {220--228},
     year = {1975},
     volume = {10},
     zbl = {0299.06002},
     url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134114/}
}