References
- Abe , E. 1977 . Hopf algebras , Cambridge Univ. Press .
- Beattie , M. 1994 . A right crossed product and duality . Comm.Algebra , 22 : 229 – 241 .
- Caenepeel , S. , Dascalescu , S. and Raianu , S. Cosemisimple Hopf algebras coacting on coalgebras , preprint .
- Doi , Y. 1981 . Homological coalgebra . J. Math. Soc. Japan , 33 : 31 – 50 .
- Dǎscǎlescu , S. , Raianu , S. and Zhang , Y.H. Finite Hopf–Galois Coextensions, Crossed coproducts and duality . J.Algebra , to appear in
- Dǎscǎlescu , S. , Nǎstǎsescu , S. , Raianu , S. and Van Oystaeyen , F. Graded coalgebras and Morita–Takeuchi contexis . Tsukuba J. Math. , to appear in
- Gabriel , P. 1962 . Des catégories abeliennes . Bull. Soc. Math. France , 90 : 323 – 448 .
- Koppinen , M. Variations on the smash product with applications to group graded rings preprint
- Molnar , R.K. 1977 . Semi–direct products of Hopf algebras . J. Algebra , 47 : 29 – 51 .
- Nǎstǎsescu , C. , Raianu , S. and Van Oystaeyen , F. 1990 . Modules graded by G‐ sets Math. Z. , Vol. 203 , 605 – 627 . Amsterdam, , Amsterdam : North–Holland . 1982
- Nǎstǎsescu , C. and Torrecillas , B. 1993 . Graded Coalgebras . Tsukuba J. Math. , 17 : 461 – 479 .
- Nǎstǎsescu , C. and Torrecillas , B. 1995 . A Clifford Theory for graded coalgebras . 174 : 573 – 586 . J. Algebra
- Nǎstǎsescu , C. and Van Oystaeyen , F. 1982 . “ Graded Ring Theory ” . In Math. Library Vol. 28 , North Holland, , Amsterdam
- Sweedler , M.E. 1969 . Hopf Algebras , New York : Benjamin .
- Takeuchi , M. 1977 . Morita theorems for categories of comodules . J. Fac. Sci. Univ. Tokyo , 24 : 629 – 644 .