1. Pointed Hopf algebras;Andruskiewitsch,2002
2. A characterization of quantum groups;Andruskiewitsch;J. Reine Angew. Math.,2004
3. On the classification of finite-dimensional pointed Hopf algebras;Andruskiewitsch;Ann. Math. (2),2010
4. On Nichols algebras of diagonal type;Angiono;J. Reine Angew. Math.,2013