@article{MZ_1967__99_170768,
     author = {Alfred L. Foster},
     title = {Semi-primal {Algebras;} {Characterization} and {Normal-decomposition.}},
     journal = {Mathematische Zeitschrift},
     pages = {105--116},
     publisher = {mathdoc},
     volume = {99},
     year = {1967},
     zbl = {0158.01801},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__99_170768/}
}