  In a recent paper Schechter, Imry and Levinson (cond-mat/9709248) \cite{r1}
analysed the density-of-states (DOS) and the conductance of a S/N junction with
a barrier. They showed that the DOS in the N conductor near the barrier is
strongly affected by the superconductor if the energy $\epsilon$ is small:
$l_{n} \sqrt{\epsilon/D}{\ll} \Gamma {\ll} 1$, where $l_{n}$ is the mean free
path, $D$ is the diffusion constant, and $\Gamma$ is the barrier transmittance.
We would like to note that this problem was analysed in several papers with the
use of different approaches. In particular, the author has calculated the DOS
and the conductance of S/N structures with a barrier using quasiclassical
matrix Green's function technique well developed in the theory of
superconductivity \cite{r2}. It was shown that in an 1-d S/N structure a
pseudogap appears in the N conductor near the S/N interface, and the DOS
approaches it's normal value at energies $\epsilon$ exceeding an energy
$\epsilon_{N}$ related to the interface transmittance; here $\epsilon_{N}=D/(2
R_{b} \sigma)^{2}$, $R_{b}$ is the interface resistance per unit area, and
$\sigma$ is the specific conductivity of the N conductor. It was shown that
peculiarities in the DOS at small energies lead to a subgap conductance at zero
temperature. This subgap conductance is caused by a component of the current
which is known in the theory of the Josephson effect as the interference
current.Therefore, the results for the DOS and the conductance in Ref \cite{r1}
are similar to the ones obtained earlier, but their interpretation of the
subgap conductance differs from that given in Ref.\cite{r2} because they use
another approach for the calculation of the conductance .
