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J. P. Pérez-Beaupuits, R. Güsten, M. Spaans, V. Ossenkopf, K. M. Menten, M. A. Requena-Torres, H. Wiesemeyer, J. Stutzki, C. Guevara and R. Simon
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DOI: https://doi.org/10.1051/0004-6361/201526441