@article{PORMA_1957__16_1_114781,
     author = {Keedy, M.L.},
     title = {On a theorem of {J\'onsson} and {Tarski}},
     journal = {Portugaliae mathematica},
     pages = {11--14},
     year = {1957},
     volume = {16},
     number = {1},
     mrnumber = {0101200},
     zbl = {0090.25002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1957__16_1_114781/}
}