1. The inverse problem in the quantum theory of scattering;Faddeev;J. Math. Phys.,1963
2. Sturm-Liouville Operators and Applications;Marchenko,1986
3. Methods of Modern Mathematical Physics. III Scattering Theory;Reed,1979
4. Inverse Problems in Quantum Scattering Theory;Chadan,1977
5. Inverse Sturm – Liouville Problems;Levitan,1987