1. The Brauer group of a commutative ring;Auslander;Trans. Amer. Math. Soc.,1960
2. On maximally central algebras;Azumaya;Nagoya Math. J.,1951
3. Algèbre Commutative;Bourbaki,1964
4. Galois theory and cohomology of commutative rings;Chase;Mem. Amer. Math. Soc.,1965
5. The group of unramified Kummer extensions of prime degree;Childs,1977