Weiss, Axel Max Planck Institute for Radio Astronomy, Max Planck Society;
Riechers, D. A., Weiss, A., Walter, F., Carilli, C. L., Cox, P., Decarli, R., et al. (2022). Microwave background temperature at a redshift of 6.34 from H2O absorption. \nat, 602(7895), 58-62. doi:10.1038/s41586-021-04294-5.