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Author: Riquelme, D. et al.; Genre: Journal Article; Issued: 2018-02; Keywords: ISM: abundances, ISM: clouds, ISM: molecules, ISM: kinematics and dynamics, Galaxy: center, radio lines: ISM; Title: The diffuse molecular component in the nuclear bulge of the Milky Way
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Riquelme et al. (2018) studied this question.