Kostenko, A. S. Spectral analysis of indefinite Sturm-Liouville operators. (English. Russian original) Zbl 1325.47083 Funct. Anal. Appl. 48, No. 3, 227-230 (2014); translation from Funkts. Anal Prilozh. 48, No. 3, 88-92 (2014). Reviewer: Andreas Fleige (Dortmund) MSC: 47B50 34B24 34B09 34L10 47E05 PDF BibTeX XML Cite \textit{A. S. Kostenko}, Funct. Anal. Appl. 48, No. 3, 227--230 (2014; Zbl 1325.47083); translation from Funkts. Anal Prilozh. 48, No. 3, 88--92 (2014) Full Text: DOI
Parfenov, A. I. On an embedding criterion for interpolation spaces and application to indefinite spectral problems. (Russian, English) Zbl 1033.46059 Sib. Mat. Zh. 44, No. 4, 810-819 (2003); translation in Sib. Math. J. 44, No. 4, 638-644 (2003). MSC: 46M35 35P20 35P05 PDF BibTeX XML Cite \textit{A. I. Parfenov}, Sib. Mat. Zh. 44, No. 4, 810--819 (2003; Zbl 1033.46059); translation in Sib. Math. J. 44, No. 4, 638--644 (2003) Full Text: EMIS EuDML