REFERENCES
- Beattie , M. , Bulacu , D. , Torrecillas , B. ( 2007 ). Radford's S 4 formula for co-Frobenius Hopf algebras . J. Algebra 307 : 330 – 342 .
- Beattie , M. , Dăscălescu , S. , Grünenfelder , L. , Năstăsescu , C. ( 1998 ). Finiteness conditions, co-Frobenius Hopf algebras, and quantum groups . J. Algebra 200 : 312 – 333 .
- Beattie , M. , Dăscălescu , S. , Raianu , Ş. ( 1997 ). Galois Extensions for co-Frobenius Hopf algebras . J. Algebra 198 : 164 – 183 .
- Dăscălescu , S. , Năstăsescu , C. , Raianu , Ş. ( 2001 ). Hopf Algebras: An Introduction . Monographs Textbooks in Pure Appl. Math. , Vol. 235 . New York : Dekker .
- Delvaux , L. , Van Daele , A. , Wang , S. A note on Radford's formula, arXiv:math.RA/060809 .
- Delvaux , L. , Van Daele , A. , Wang , S. ( 2005 ). Quasitriangular (G-cograded) multiplier Hopf algebras . J. Algebra 289 : 484 – 514 .
- Doi , Y. ( 1993 ). Braided bialgebras and quadratic bialgebras . Comm. Algebra 21 ( 5 ): 1731 – 1749 .
- Drinfeld , V. G. ( 1990 ). On almost cocommutative Hopf algebras . Leningrad Math. J. 1 : 321 – 342 .
- Kassel , C. ( 1995 ). Quantum Groups . Graduate Texts in Mathematics 155 . Berlin : Springer-Verlag .
- Montgomery , S. ( 1993 ). Hopf Algebras and Their Actions on Rings . Providence : American Mathematical Society .
- Radford , D. E. ( 1992 ). On the antipode of a quasitriangular Hopf algebra . J. Algebra 151 : 1 – 11 .
- Radford , D. E. ( 1993 ). Minimal quasitriangular Hopf algebras . J. Algebra 157 : 285 – 315 .
- Radford , D. E. ( 1994 ). On Kauffman's knot invariants arising from finite-dimensional Hopf algebras . Advances in Hopf Algebras (Chicago, IL, 1992) . Lecture Notes in Pure and Appl. Math. 158 . New York : Dekker , pp. 205 – 266 .
- Schneider , H.-J. ( 2001 ). Some properties of factorizable Hopf algebras . Proc. Amer. Math. Soc. 129 ( 7 ): 1891 – 1898 .
- Sweedler , M. E. ( 1969 ). Hopf Algebras . New York : Benjamin .
- Takeuchi , M. ( 1992 ). Hopf algebra techniques applied to the quantum group U q (sl(2)) . Contemp. Math. 134 : 309 – 323 .
- Communicated by M. Cohen.