BFV analysis of the $U_{EM}(1)$ gauged SU(3) WZW model and the   Faddeev-Jackiw approach
  The four dimensional SU(3) WZW model coupled to electromagnetism is treated as a constrained system in the context of Batalin-Fradkin- Vilkovisky formalism. It is shown that this treatment is equivalent to the Faddeev-Jackiw (FJ) approach. It is also shown that the field redefinitions that transform the fields of the model into BRST and $\sigma$ closed are actually the Darboux's transformations used in the FJ formalism. 
J.E.Paschalis and P.I.Porfyriadis