1. Galois theory and Galois cohomology of commutative rings;Chase;Mem. Amer. Math. Soc.,1965
2. S. U. Chase and M. Sweedler, “Hopf Algebras and Galois Theory,” Lecture Notes in Mathematics, Vol. 97, Springer-Verlag, New York/Berlin.
3. M.-A. Knus and M. Ojanguren, “Théorie de la descente et algèbres d'Azumaya,” Lecture Notes in Mathematics, Vol. 389, Springer-Verlag, New York/Berlin.
4. Hopf Algebras;Sweedler,1969
5. P-polynomials and H-Galois extensions;Nakajima,1984