The RMS survey: mid-infrared observations of candidate massive YSOs in the southern hemisphereJ. C. Mottram, M. G. Hoare, S. L. Lumsden, R. D. Oudmaijer, J. S. Urquhart, T. L. Sheret, A. J. Clarke and J. AllsoppA&A, 476 2 (2007) 1019-1111DOI: https://doi.org/10.1051/0004-6361:20077663