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\bibitem{Dedes_etal2010} Dedes, C., R{\"o}llig, M., Mookerjea, B., Okada, Y., Ossenkopf, V., Bruderer, S., et al. (2010). The origin of the [C II] emission in the S140 photon-dominated regions. New insights from HIFI. \textit{Astron. Astrophys.}, \textit{521}, L24.

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