Star-forming protoclusters associated with methanol masers V. Minier, M. G. Burton, T. Hill, M. R. Pestalozzi, C. R. Purcell, G. Garay, A. J. Walsh and S. Longmore A&A, 429 3 (2005) 945-960 Published online: 05 January 2005 DOI: 10.1051/0004-6361:20041137