%0 Journal Article %A A.L. FOSTER %T Families of Algebras with Unique (Sub-) Direct Factorization: Equational Characterization of Factorization. %J Mathematische Annalen %D 1966 %P 302-326 %V 166 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1966__166_161467/ %F MAN_1966__166_161467