Planck’s dusty GEMS - VI. Multi-J CO excitation and interstellar medium conditions in dusty starburst galaxies at z = 2–4R. Cañameras, C. Yang, N. P. H. Nesvadba, A. Beelen, R. Kneissl, S. Koenig, E. Le Floc’h, M. Limousin, S. Malhotra, A. Omont and D. ScottA&A, 620 (2018) A61DOI: https://doi.org/10.1051/0004-6361/201833625