@article{GDZPPN002219387, title = {Forms of Certain Hopf Algebras.}, journal = {Manuscripta mathematica}, volume = {17}, year = {1975}, pages = {333-338}, zbl = {0324.16010}, url = {http://dml.mathdoc.fr/item/GDZPPN002219387} }
Radford, D.E.; Taft, E.J.; Wilson, R.L. Forms of Certain Hopf Algebras.. Manuscripta mathematica, Tome 17 (1975) pp. 333-338. http://gdmltest.u-ga.fr/item/GDZPPN002219387/