1. Sturm–Liouville Operators and Their Applications;Marchenko,1977
2. Inverse Sturm–Liouville Problems;Levitan,1984
3. Inverse Spectral Theory;Pöschel,1987
4. Inverse Sturm–Liouville Problems and Their Applications;Freiling,2001
5. Inverse Problems in Quantum Scattering Theory;Chadan,1977