@article{MAN_1967__172_161576,
     author = {P.V. Jagannadham},
     title = {A {Characterisation}  of {Boolean} {Extension} of {Universal} {Algebras}},
     journal = {Mathematische Annalen},
     pages = {119--123},
     publisher = {mathdoc},
     volume = {172},
     year = {1967},
     zbl = {0149.26002},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__172_161576/}
}