Inverse boundary value problem for linear Schr\"odinger equation in two   dimensions
  We relax the regularity condition on potentials of Schr\"odinger equations in the uniqueness results in \cite{EB} and \cite{IY2} for the inverse boundary value problem of determining a potential by Dirichlet-to-Neumann map. 
Oleg Yu. Imanuvilov, Masahiro Yamamoto
math-ph math.AP math.MP