Observation of H2O in a strongly lensed Herschel-ATLAS source at z = 2.3 A. Omont, R. Neri, P. Cox, R. Lupu, M. Guélin, P. van der Werf, A. Weiß, R. Ivison, M. Negrello, L. Leeuw et al. (47 more) A&A, 530 (2011) L3 Published online: 28 April 2011 DOI: 10.1051/0004-6361/201116921