Very fast variations of SiO maser emission in evolved stars M. Gómez-Garrido, V. Bujarrabal, J. Alcolea, R. Soria-Ruiz, P. de Vicente and J.-F. Desmurs A&A, 642 (2020) A213 Published online: 22 October 2020 DOI: 10.1051/0004-6361/202037499