%0 Journal Article %A A.L. FOSTER %T Functional Completeness in the Small Algebraic Structure Theorems and Identities. %J Mathematische Annalen %D 1961 %P 29-58 %V 143 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1961__143_160850/ %F MAN_1961__143_160850