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\bibitem{NEXTCollaborationFelkai_etal2018} NEXT Collaboration(Felkai, R. et al), Sorel, M., Lopez-March, N., Gomez-Cadenas, J. J., Alvarez, V., Benlloch-Rodriguez, J. M., et al. (2018). Helium-Xenon mixtures to improve the topological signature in high pressure gas xenon TPCs. \textit{Nucl. Instrum. Methods Phys. Res. A}, \textit{905}, 82--90.

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