@article{SF_1974__6_133975,
     author = {John B. Hickey},
     title = {A type of semilattice product.},
     journal = {Semigroup forum},
     pages = {198--215},
     year = {1974},
     volume = {6},
     zbl = {0262.06004},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133975/}
}