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\bibitem{Kopp_etal2007} Kopp, V. I., Churikov, V. M., Zhang, G., Singer, J., Draper, C. W., Chao, N., et al. (2007). Chiral fiber gratings: perspectives and challenges for sensing applications. In \textit{Proceedings of Third european workshop on optical fibre sensors} (Vol. 6619, pp. 66190B--(pp. 1--8)).

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