LABOCA and MAMBO-2 imaging of the dust ring of the Sombrero galaxy (NGC 4594) C. Vlahakis, M. Baes, G. Bendo and A. Lundgren A&A, 485 3 (2008) L25-L28 Published online: 27 May 2008 DOI: 10.1051/0004-6361:200810048