1. The inverse Sturm–Liouville problem III;Dahlberg;Comm. Pure Appl. Math.,1984
2. M.C. Drignei, Inverse Sturm–Liouville problems using multiple spectra, PhD thesis, Iowa State University, 2008
3. Partial Differential Equations;Evans,1998
4. On the determination of a potential from three spectra;Gesztesy,1999
5. Inverse spectral problems for Sturm–Liouville operators with singular potentials, III. Reconstruction by three spectra;Hryniv;J. Math. Anal. Appl.,2003