Davies, B.; Gutkin, E. Intertwining operators and the quantum inverse method for the nonlinear Schrödinger equation. (English) Zbl 0696.35149 Physica A 151, 167-192 (1988). MSC: 35Q99 81T99 PDFBibTeX XMLCite \textit{B. Davies} and \textit{E. Gutkin}, Physica A 151, 167--192 (1988; Zbl 0696.35149) Full Text: DOI
Van der Linden, J.; Nijhoff, F. W.; Capel, H. W.; Quispel, G. R. W. Linear integral equations and multicomponent nonlinear integrable systems. I. (English) Zbl 0697.35133 Physica A 137, 44-80 (1986). MSC: 35Q99 37J35 37K10 81T99 PDFBibTeX XMLCite \textit{J. Van der Linden} et al., Physica A 137, 44--80 (1986; Zbl 0697.35133) Full Text: DOI
Bender, Carl M. Finite element approximation in quantum theory. (English) Zbl 0598.65093 Physica A 124, 91-102 (1984). MSC: 65Z05 65N30 81T99 PDFBibTeX XMLCite \textit{C. M. Bender}, Physica A 124, 91--102 (1984; Zbl 0598.65093) Full Text: DOI