Volatile exposures on the 67P/Churyumov-Gerasimenko nucleus S. Fornasier, H. V. Hoang, M. Fulle, E. Quirico and M. Ciarniello A&A, 672 (2023) A136 Published online: 14 April 2023 DOI: 10.1051/0004-6361/202245614