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<response><item key="0"><nothing>D. I. Borisov, Dmitry Zezyulin, M. Znojil, "Bifurcations of thresholds in essential spectra of elliptic operators under localized non&#x2010;Hermitian perturbations", Studies in Applied Mathematics, vol. 146, pp. 834-880, 2021, [DOI: 10.1111/sapm.12367] [IF: 2.34, SJR: 0.90]</nothing></item></response>
