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\bibitem{Bakhvalova_etal2019} Bakhvalova, T., Belkin, M. E., Kovalyuk, V. V., Prokhodtcov, A. I., Goltsman, G. N., \& Sigov, A. S. (2019). Studying key principles for design and fabrication of silicon photonic-based beamforming networks. In \textit{PIERS-Spring} (pp. 745--751).

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