Sulphur and carbon isotopes towards Galactic centre clouds P. K. Humire, V. Thiel, C. Henkel, A. Belloche, J.-C. Loison, T. Pillai, D. Riquelme, V. Wakelam, N. Langer, A. Hernández-Gómez et al. (2 more) A&A, 642 (2020) A222 Published online: 23 October 2020 DOI: 10.1051/0004-6361/202038216