Constraining cloud parameters using high density gas tracers in galaxies M. V. Kazandjian, I. Pelupessy, R. Meijerink, F. P. Israel, C. M. Coppola, M. J. F. Rosenberg and M. Spaans A&A, 595 (2016) A124 Published online: 15 November 2016 DOI: 10.1051/0004-6361/201424594