  For the Generalized Plane Stress (GPS) problem in linear elasticity, we
obtain an optimal stability estimate of logarithmic type for the inverse
problem of determining smooth cavities inside a thin isotropic cylinder {}from
a single boundary measurement of traction and displacement. The result is
obtained by reformulating the GPS problem as a Kirchhoff-Love plate-like
problem in terms of the Airy's function, and by using the strong unique
continuation at the boundary for a Kirchhoff-Love plate operator under
homogeneous Dirichlet conditions, which has been recently obtained in
\cite{l:arv}.
