Birman, M. Sh.; Pushnitski, A. B. Spectral shift function, amazing and multifaceted. (English) Zbl 0907.47014 Integral Equations Oper. Theory 30, No. 2, 191-199 (1998). MSC: 47B25 47A55 PDF BibTeX XML Cite \textit{M. Sh. Birman} and \textit{A. B. Pushnitski}, Integral Equations Oper. Theory 30, No. 2, 191--199 (1998; Zbl 0907.47014) Full Text: DOI OpenURL
Dreyfus, Tommy The determinant of the scattering matrix and its relation to the number of eigenvalues. (English) Zbl 0382.47005 J. Math. Anal. Appl. 64, 114-134 (1978). MSC: 47A40 47B10 PDF BibTeX XML Cite \textit{T. Dreyfus}, J. Math. Anal. Appl. 64, 114--134 (1978; Zbl 0382.47005) Full Text: DOI OpenURL