$SU(2,R)_q $ Symmetries of Non-Abelian Toda Theories
  The classical and quantum algebras of a class of conformal NA-Toda models are studied. It is shown that the $SL(2,R)_q$ Poisson brackets algebra generated by certain chiral and antichiral charges of the nonlocal currents and the global U(1) charge appears as an algebra of the symmetries of these models. 
J. F. Gomes, G. M. Sotkov and A. H. Zimerman