1. Chadan K, Colton D, Paivarinta L, Rundell W SIAM Monographs on Mathematical Modeling and Computation. In An Introduction to Inverse Scattering and Inverse Spectral Problems. SIAM, Philadelphia; 1997.
2. Freiling G, Yurko VA: Inverse Sturm-Liouville Problems and Their Applications. Nova Science Publishers, New York; 2001.
3. Levitan BM: Inverse Sturm-Liouville Problems. Nauka, Moscow; 1984. English transl., VNU Sci. Press, Utrecht (1987)
4. Marchenko VA: Sturm-Liouville Operators and Their Applications. Naukova Dumka, Kiev; 1977. English transl., Birkhäuser (1986)
5. Pöschel J: Trubowitz E. Inverse Spectral Theory. Academic Press, New York; 1987.