1. S. Albeverio, F. Gesztesy, R. Hoegh-Krohn, H. Holden, Solvable Models in Quantum Mechanics, 2nd edn. (AMS Chelsea Publishing, Providence, RI, 2005)
2. A.B. Aleksandrov, S. Janson, V.V. Peller, R. Rochberg, An interesting class of operators with unusual Schatten–von Neumann behavior, in Function Spaces, Interpolation Theory and Related Topics (Lund, 2000) (de Gruyter, Berlin, 2002), pp. 61–149
3. C. Bennewitz, B.M. Brown, R. Weikard, Inverse spectral and scattering theory for the half-line left-definite Sturm–Liouville problem. SIAM J. Math. Anal. 40(5), 2105–2131 (2008/09)
4. V.I. Bogachev, Measure Theory, vol. I, II (Springer, Berlin, 2007)
5. R. Camassa, D. Holm, An integrable shallow water equation with peaked solitons. Phys. Rev. Lett. 71(11), 1661–1664 (1993)