Kahane, Jean-Pierre; Lévy-Leblond, Jean-Marc; Sjöstrand, Johannes An inverse Heisenberg inequality. (Une inégalité de Heisenberg inverse.) (French) Zbl 0793.35066 J. Anal. Math. 60, 135-155 (1993). Reviewer: B.Helffer (Paris) MSC: 35P05 35Q40 81Q10 PDFBibTeX XMLCite \textit{J.-P. Kahane} et al., J. Anal. Math. 60, 135--155 (1993; Zbl 0793.35066) Full Text: DOI
Sjöstrand, Johannes Infinite systems of potential wells. (English) Zbl 0808.35086 J. Anal. Math. 59, 217-224 (1992). Reviewer: B.Helffer (Paris) MSC: 35P15 81Q20 35Q40 PDFBibTeX XMLCite \textit{J. Sjöstrand}, J. Anal. Math. 59, 217--224 (1992; Zbl 0808.35086) Full Text: DOI
Menikoff, A.; Sjöstrand, J. The eigenvalues of hypoelliptic operators. III: The non-semibounded case. (English) Zbl 0436.35065 J. Anal. Math. 35, 123-150 (1979). MSC: 35P20 35S99 65H10 58J40 PDFBibTeX XMLCite \textit{A. Menikoff} and \textit{J. Sjöstrand}, J. Anal. Math. 35, 123--150 (1979; Zbl 0436.35065) Full Text: DOI