Mizrahi, Maurice M. On the WKB approximation to the propagator for arbitrary Hamiltonians. (English) Zbl 0498.70024 J. Math. Phys. 22, 102-107 (1981). MSC: 70G99 81S40 81P20 81Q05 35S99 PDFBibTeX XMLCite \textit{M. M. Mizrahi}, J. Math. Phys. 22, 102--107 (1981; Zbl 0498.70024) Full Text: DOI Link
Mizrahi, Maurice M. The semiclassical expansion of the anharmonic-oscillator propagator. (English) Zbl 0417.70009 J. Math. Phys. 20, 844-855 (1979). MSC: 70K99 34E20 81R20 PDFBibTeX XMLCite \textit{M. M. Mizrahi}, J. Math. Phys. 20, 844--855 (1979; Zbl 0417.70009) Full Text: DOI