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@article{MM2_1972__7_154119, author = {Mitsuhiro Takeuchi}, title = {A {Correspondence} between {Hopf} {Ideals} and {Sub-Hopf} {Algebras.}}, journal = {Manuscripta mathematica}, pages = {251--270}, publisher = {mathdoc}, volume = {7}, year = {1972}, zbl = {0238.16011}, url = {http://geodesic.mathdoc.fr/item/MM2_1972__7_154119/} }
Mitsuhiro Takeuchi. A Correspondence between Hopf Ideals and Sub-Hopf Algebras.. Manuscripta mathematica, Tome 7 (1972), pp. 251-270. http://geodesic.mathdoc.fr/item/MM2_1972__7_154119/