ArticleSpectral relations for a 4 × 4 block operator matrixHakimboy M. Latipov·Tulkin H. Rasulov·2023·enABIABI:AkademIndex/openalex/2026.other.289617CiteAbstractNo abstract available.IdentifiersDOI10.1063/5.0144165Citations and referencesCited by 30 referencesMetrics — AkademScholar