Planck’s Dusty GEMS - VIII. Dense-gas reservoirs in the most active dusty starbursts at z ∼ 3R. Cañameras, N. P. H. Nesvadba, R. Kneissl, S. König, C. Yang, A. Beelen, R. Hill, E. Le Floc’h and D. ScottA&A, 645 (2021) A45DOI: https://doi.org/10.1051/0004-6361/202038979