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\bibitem{Kovaluyk_etal2019} Kovaluyk, V., Lazarenko, P., Kozyukhin, S., An, P., Prokhodtsov, A., Goltsman, G., et al. (2019). Influence of the phase state of Ge2Sb2Te5 thin cover on the parameters of the optical waveguide structures. In \textit{Proc. Amorphous and Nanostructured Chalcogenides} (pp. 47--48). Technical University of Moldova.

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