FURTHER ON THE CURRENT-ALGEBRA OF WZNW MODELS AT AND AWAY FROM CRITICALITY

We comment on the off-critical perturbations of WZNW models by a mass term as well as by another descendent operator, when we can compare th e results with further algebra obtained from the Dirac quantization of the model, in such a way that a more general class of models be inclu ded. We discover, in both cases, hidden Kac-Moody algebras obeyed by s ome currents in the off-critical case, which in several cases are enou gh to completely fix the correlation functions.