Buslaev, Vladimir; Grigis, Alain Turning points for adiabatically perturbed periodic equations. (English) Zbl 0987.35013 J. Anal. Math. 84, 67-143 (2001). Reviewer: Ion Onciulescu (Iaşi) MSC: 35B10 PDF BibTeX XML Cite \textit{V. Buslaev} and \textit{A. Grigis}, J. Anal. Math. 84, 67--143 (2001; Zbl 0987.35013) Full Text: DOI OpenURL
Grinina, E. A. Solutions to the operator equation \(i\varepsilon dy/dt=A(t)y\) on intervals containing turning points. (English. Russian original) Zbl 0964.34039 Theor. Math. Phys. 122, No. 3, 298-311 (2000); translation from Teor. Mat. Fiz. 122, No. 3, 357-371 (2000). Reviewer: N.C.Apreutesei (Iasi) MSC: 34D05 34E20 34G10 34E05 PDF BibTeX XML Cite \textit{E. A. Grinina}, Theor. Math. Phys. 122, No. 3, 357--371 (2000; Zbl 0964.34039); translation from Teor. Mat. Fiz. 122, No. 3, 357--371 (2000) Full Text: DOI OpenURL
Terman, D. Ya. Splitting of the spactrum of the Laplace operator on an ellipse with cuts. (English. Russian original) Zbl 0741.35045 J. Sov. Math. 57, No. 3, 3176-3180 (1991); translation from Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 179, 173-178 (1989). MSC: 35P05 35J05 PDF BibTeX XML Cite \textit{D. Ya. Terman}, J. Sov. Math. 57, No. 3, 3176--3180 (1989; Zbl 0741.35045); translation from Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 179, 173--178 (1989) Full Text: DOI OpenURL