<?xml version="1.0"?>
<response><item key="0"><nothing>D. I. Borisov, Dmitry Zezyulin, "On the Bifurcation of Thresholds of the Essential Spectrum with a Spectral Singularity", Differential Equations, vol. 59, pp. 278-282, 2023, [DOI: 10.1134/s0012266123020118] [IF: 0.84, SJR: 0.54]</nothing></item><item key="1"><nothing>D. I. Borisov, Dmitry Zezyulin, "Bifurcations of Essential Spectra   Generated by a Small Non-Hermitian  Hole. II.    Eigenvalues and Resonances", Russian Journal of Mathematical Physics, vol. 29, pp. 321-341, 2022, [DOI: 10.1134/s1061920822030037] [IF: 1.52, SJR: 0.69]</nothing></item></response>
