H. Aratyn et al., ON NONLINEAR W-INFINITY SYMMETRY OF GENERALIZED LIOUVILLE AND CONFORMAL TODA MODELS, Physics letters. Section B, 318(4), 1993, pp. 604-612
Invariance under non-linear ($) over cap W infinity algebra is shown f
or the two-boson Liouville type of model and its algebraic generalizat
ions, the extended conformal Toda models. The realization of the corre
sponding generators in terms of two boson currents within KP hierarchy
is presented.