Singular manifold method for an equation in 2+1 dimensions
  he Singular Manifold Method is presented as an excellent tool to study a 2+1 dimensional equation in despite of the fact that the same method presents several problems when applied to 1+1 reductions of the same equation. Nevertheless these problems are solved when the number of dimensions of the equation is increased. 
P. G. Estevez and J. Prada