Decomposition of some pointed Hopf algebras given by the canonical   Nakayama automorphism
  Every finite dimensional Hopf algebra is a Frobenius algebra, with Frobenius homomorphism given by an integral. The Nakayama automorphism determined by it yields a decomposition with degrees in a cyclic group. For a family of pointed Hopf algebras, we determine necessary and sufficient conditions for this decomposition to be strongly graded. 
M. Gra\~na, J.A. Guccione and J.J. Guccione