  The proper-time regularization of bosonic string reproduces the results of
canonical quantization in a special scaling limit where the length in target
space has to be renormalized. We repeat the analysis for the Pauli-Villars
regularization and demonstrate the universality of the results. In the
mean-field approximation we compute the susceptibility anomalous dimension and
show it equals 1/2. We discuss the relation with the previously known results
on lattice strings.
