Khatskevich, V. A. Über invariante Unterräume gewisser Klassen linearer Operatoren in normierten Räumen mit indefiniter Metrik. (Russian) Zbl 0246.47011 Mat. Issled. 6, No. 3(21), 133-147 (1971). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 47A15 Invariant subspaces of linear operators 47B50 Linear operators on spaces with an indefinite metric PDFBibTeX XMLCite \textit{V. A. Khatskevich}, Mat. Issled. 6, No. 3(21), 133--147 (1971; Zbl 0246.47011)