Photon dominated regions in the spiral arms of M 83 and M 51C. Kramer, B. Mookerjea, E. Bayet, S. Garcia-Burillo, M. Gerin, F. P. Israel, J. Stutzki and J. G. A. WouterlootA&A, 441 3 (2005) 961-973DOI: https://doi.org/10.1051/0004-6361:20053358
