1. Homological dimension in Noetherian rings II;Auslander;Trans. Am. Math. Soc.,1958
2. Injective dimension in Noetherian rings;Bass;Trans. Am. Math. Soc.,1962
3. Grothendieck groups and Picard groups of Abelian group rings;Bass;Ann. Math. (2),1967
4. All modules have flat covers;Bican;Bull. Lond. Math. Soc.,2001
5. D. Dailey, S. Iyengar, T. Marley, Frobenius rigidity and flat dimension, in preparation.