Detection of H2O and OH+ in z > 3 hot dust-obscured galaxies F. Stanley, K. K. Knudsen, S. Aalto, L. Fan, N. Falstad and E. Humphreys A&A, 646 (2021) A178 Published online: 23 February 2021 DOI: 10.1051/0004-6361/202037888