Pravda-Starov, Karel Pseudo-spectrum for a class of semi-classical operators. (English) Zbl 1210.35310 Bull. Soc. Math. Fr. 136, No. 3, 329-372 (2008). MSC: 35S05 35B45 47G30 PDF BibTeX XML Cite \textit{K. Pravda-Starov}, Bull. Soc. Math. Fr. 136, No. 3, 329--372 (2008; Zbl 1210.35310) Full Text: DOI Link OpenURL
Grenier, E. Pseudo-differential energy estimates of singular perturbations. (English) Zbl 0884.35183 Commun. Pure Appl. Math. 50, No. 9, 821-865 (1997). Reviewer: L.Rodino (Torino) MSC: 35S05 35Q35 76X05 PDF BibTeX XML Cite \textit{E. Grenier}, Commun. Pure Appl. Math. 50, No. 9, 821--865 (1997; Zbl 0884.35183) Full Text: DOI OpenURL