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<response><item key="0"><nothing>Denis Novitsky, Alexander Shalin, Andrey V. Novitsky, "The exceptional points of non-Hermitian optical systems: Scattering matrix definition, coherent perfect absorption, and lasing", AIP Conference Proceedings, vol. 2300, pp. 020092, 2020, [DOI: 10.1063/5.0031767] [SJR: 0.19]</nothing></item></response>
