References
- Blaterner , R.J. and Montgomery , S. 1989 . Crossed products and Galois extensions of Hopf algebras . Pacific J. Math , 137 : 37 – 54 .
- Cohen , M. and Fischman , D. 1986 . Hopf algebra action . J. Algebra , 100 : 363 – 379 .
- Cohen , M. and Fischman , D. 1992 . Semisimple extensions and elements of trace 1 . J Algebra , 149 : 419 – 437 .
- Cohen , M. and Westreich , S. 1994 . From super symmetry to quantum commutativity . J Algebra , 168 : 1 – 27 .
- Larson , R.G. and Sweedler , M. 1969 . An associative orthogonal bilinear form for Hopf algebras . Amer. J. Math , 91 : 75 – 93 .
- Montgomery , S. 1993 . “ Hopf Algebras and Their Actions on Rings ” . In CBMS Lectures in Math , Vol. 82 , Providence, RI : AMS .
- Schneider , H.-J . 1990 . Principal homogeneous space for arbitrary Hopf algebras . Israel. J. Math , 72 : 167 – 195 .
- Sweedler , M. 1969 . Hopf Algebras , New York : Benjamin .
- Yang , S. and Chen , J. 1997 . Hopf actions on factor rings and induced Hopf actions . Comm. in Algebra , 25 ( 4 ) : 1103 – 1110 .