On n-Ality Theories in Rings and their Logical Algebras, Including Tri-Ality Principle in Three Valued Logics
Alfred L. Foster · American Journal of Mathematics · 1950
Alfred L. Foster, On n-Ality Theories in Rings and their Logical Algebras, Including Tri-Ality Principle in Three Valued Logics, American Journal of Mathematics, Vol. 72, No. 1 (Jan., 1950), pp. 101-123