@article{PORMA_1949__8_2_114678,
     author = {Ellis, David},
     title = {An algebraic characterization of lattices among semilattices},
     journal = {Portugaliae mathematica},
     pages = {103--106},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {1949},
     mrnumber = {0036745},
     zbl = {0038.02101},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1949__8_2_114678/}
}