Miura and Generalized B\"acklund Transformation for KdV Hierarchy
  Using the fact that Miura transformation can be expressed in the form of gauge transformation connecting the KdV and mKdV equations, we discuss the derivation of the B\"acklund transformation and its Miura-gauge transformation connecting both hierarchies. 
J. F. Gomes, A. L. Retore and A. H. Zimerman
nlin.SI hep-th math-ph math.MP