Cite
MLA Citation
Aref Jeribi et al.. “Properties of Demicompact Operators, Essential Spectra and Some Perturbation Results for Block Operator Matrices with Applications.” Linear & multilinear algebra, vol. 68, no. 12, 2020, pp. 2506–2522. http://access.bl.uk/ark:/81055/vdc_100113595187.0x000047