Theohari-Apostolidi, Th.; Vavatsoulas, H.
(Algebra and Discrete Mathematics, 2005)
Let G be a finite group and let Λ = ⊕g∈GΛg be a
strongly G-graded R-algebra, where R is a commutative ring with
unity. We prove that if R is a Dedekind domain with quotient field
K, Λ is an R-order in a separable K-algebra ...