Integration of the SL(2,R)/U(1) Gauged WZNW Theory by Reduction and   Quantum Parafermions
  Using a gauge invariant reduction we directly integrate the SL(2,R)/U(1) WZNW theory. We prove that the conserved parafermions of this theory are coset currents. Quantum mechanically, the parafermion algebra, the energy-momentum tensor, and `auxiliary' parafermions are deformed in a self-consistent manner. 
C. Ford (DESY-Zeuthen), G. Jorjadze (Tbilisi), G. Weigt (DESY-Zeuthen)