Thermophysics of fractures on comet 67P/Churyumov-Gerasimenko S. Höfner, J.-B. Vincent, J. Blum, B. J. R. Davidsson, H. Sierks, M. R. El-Maarry, J. Deller, M. Hofmann, X. Hu, M. Pajola et al. (48 more) A&A, 608 (2017) A121 Published online: 13 December 2017 DOI: 10.1051/0004-6361/201628726