TY  - JOUR
AU  - Andruskiewitsch, Nicolás
AU  - Witsch, Ruskie
TI  - Notes on Extensions of Hopf Algebras
JO  - Canadian journal of mathematics
PY  - 1996
SP  - 3
EP  - 42
VL  - 48
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1996-001-8/
DO  - 10.4153/CJM-1996-001-8
ID  - 10_4153_CJM_1996_001_8
ER  -