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\bibitem{Decin_etal2010} Decin, L., Justtanont, K., De Beck, E., Lombaert, R., de Koter, A., Waters, L. B. F. M., et al. (2010). Water content and wind acceleration in the envelope around the oxygen-rich AGB star IK Tauri as seen by Herschel/HIFI. \textit{Astron. Astrophys.}, \textit{521}, L4.

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