Sulphur-bearing molecules in AGB stars - I. The occurrence of hydrogen sulphideT. Danilovich, M. Van de Sande, E. De Beck, L. Decin, H. Olofsson, S. Ramstedt and T. J. MillarA&A, 606 (2017) A124DOI: https://doi.org/10.1051/0004-6361/201731203
