A Solvable Model of Two-Dimensional Dilaton-Gravity Coupled to a   Massless Scalar Field
  We present a solvable model of two-dimensional dilaton-gravity coupled to a massless scalar field. We locally integrate the field equations and briefly discuss the properties of the solutions. For a particular choice of the coupling between the dilaton and the scalar field the model can be interpreted as the two-dimensional effective theory of 2+1 cylindrical gravity minimally coupled to a massless scalar field. 
Marco Cavaglia