The abundance of S- and Si-bearing molecules in O-rich circumstellar envelopes of AGB stars S. Massalkhi, M. Agúndez, J. Cernicharo and L. Velilla-Prieto A&A, 641 (2020) A57 Published online: 09 September 2020 DOI: 10.1051/0004-6361/202037900