Torsionless T-selfdual Affine NA Toda Models
  A general construction of affine Non Abelian Toda models in terms of gauged two loop WZNW model is discussed. In particular we find the   Lie algebraic condition defining a subclass of {\it T-selfdual torsionless NA Toda models} and their zero curvature representation. 
J.F. Gomes, E. P. Gueuvoghlanian, G.M. Sotkov and A.H. Zimerman