1. t al. Scattering theory for the Schrödinger equation with repulsive potential
2. em>Asymptotic behavior of solutions of linear ordinary differential equations
3. em>Uniqueness of the self-adjoint extension of singular elliptic differential operators
4. em>On inverse scattering problem for the Schrödinger equation with repulsive potentials
5. em>Inverse scattering for a Schrodinger operator with a repulsive potential