Bethe ansatz solution of a closed spin 1 XXZ Heisenberg chain with   quantum algebra symmetry
  A quantum algebra invariant integrable closed spin 1 chain is introduced and analysed in detail. The Bethe ansatz equations as well as the energy eigenvalues of the model are obtained. The highest weight property of the Bethe vectors with respect to U_q(sl(2)) is proved. 
Jon Links, Angela Foerster and Michael Karowski