1. A correspondence between Hopf ideals and sub-Hopf algebras;Takeuchi;Manuscripta Math.,1972
2. A note on gemetrically reductive groups;Takeuchi;J. Fac. Sci. Univ. Tokyo Sect. 1,1973
3. Formal schemes over fields;Takeuchi;Comm. Algebra.,1977
4. Algebraic K-Theory;Bass,1968
5. Algèbre commutative;Bourbaki,1961