Helffer, Bernard; Kerdelhué, Phillippe On the total bandwidth for the rational Harper’s equation. (English) Zbl 0833.34085 Commun. Math. Phys. 173, No. 2, 335-356 (1995). MSC: 34L40 81Q05 PDF BibTeX XML Cite \textit{B. Helffer} and \textit{P. Kerdelhué}, Commun. Math. Phys. 173, No. 2, 335--356 (1995; Zbl 0833.34085) Full Text: DOI OpenURL
Helffer, B.; Sjöstrand, J. On diamagnetism and de Haas-van Alphen effect. (English) Zbl 0715.35070 Ann. Inst. Henri Poincaré, Phys. Théor. 52, No. 4, 303-375 (1990). Reviewer: S.M.Zverev MSC: 35Q40 81Q10 35P20 35S05 PDF BibTeX XML Cite \textit{B. Helffer} and \textit{J. Sjöstrand}, Ann. Inst. Henri Poincaré, Phys. Théor. 52, No. 4, 303--375 (1990; Zbl 0715.35070) Full Text: Numdam EuDML OpenURL