Carbon gas in SMC low-metallicity star-forming regionsM. A. Requena-Torres, F. P. Israel, Y. Okada, R. Güsten, J. Stutzki, C. Risacher, R. Simon and H. ZinneckerA&A, 589 (2016) A28DOI: https://doi.org/10.1051/0004-6361/201526244