A high-sensitivity 6.7 GHz methanol maser survey toward HO sourcesY. Xu, J. J. Li, K. Hachisuka, J. D. Pandian, K. M. Menten and C. HenkelA&A, 485 3 (2008) 729-734DOI: https://doi.org/10.1051/0004-6361:200809472
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