References
- Blattner , R.J. , Gohen , M. and Montgomery , S. 1986 . Crossed products and inner actions of Hopf algebras . Trans. AMS , 298 : 671 – 711 .
- Cohen , M. , Raianu , S. and Westreich , S. Semiinvariants for Hopf Algebra Actions . Israel J. Math. , to appear
- Doi , Y. 1985 . Algebras with total integrals . Comm. Algebra , 13 : 2137 – 2159 .
- Doi , Y. 1989 . Equivalent crossed products for a Hopf algebra . Comm. Algebra , 17 : 3053 – 3085 .
- Doi , Y. 1993 . Braided bialgebras and quadratic bialgebras . Comm. Algebra , 21 : 1731 – 1749 .
- Doi , Y. and Takeuchi , M. 1986 . Cleft comodule algebras for a bialgebra . Comm. Algebra , 14 : 801 – 817 .
- Kreimer , H.F. and Takeuchi , M. 1981 . Hopf algebras and Galois extensions of an algebra . Indiana Univ. Math. J. , 30 : 675 – 692 .
- Masuoka , A. 1994 . Cleft extensions for a Hopf algebra generated by a nearly primitive element . Comm. Algebra , 22 : 4537 – 4559 .
- Montgomery , S. . CBMS Regional Conference Series in Mathematics 82 . Hopf algebras and their actions on rings . Providence, RI : AMS .
- Takeuchi , M. 1980 . Ext ad (S p R,μ A ) ≅ [Bcirc] r(A/k) . J. Algebra , 67 : 436 – 475 .