Double Scaling Limit of the Supervirasoro Constraints
  This paper supersedes the preprint Superloop Equations in the Double Scaling Limit, CERN-TH-6575. It is an improved version with corrections in the derivation of the continuum limit, a clarification of the doubling of degrees of freedom for even potentials, and with a heuristic argument showing that the part of the free energy independent of fermion couplings in our model satisfies the KdV Hierarchy. 
Luis Alvarez-Gaume, K. Becker, M. Becker, R. Emparan and J. Manes