1. Operator Theory: Advances and Applications;V.A. Marchenko,1986
2. Surveys and Monographs;A. Zettl,2005
3. Pivovarchik, V.: An inverse Sturm–Liouville problem by three spectra. Integral Equ. Oper. Theory 34, 234–243 (1999)
4. Gesztesy, F., Simon, B.: On the determination of a potential from three spectra. Am. Math. Soc. Transl. Ser. 2 189, 85–92 (1999)
5. Albeverio, S., Hryniv, R.O., Mykytyuk, Y.V.: Inverse spectral problems for coupled oscillating systems: reconstruction from three spectra. Methods Funct. Anal. Topol. 13, 110–123 (2007)