3812 20190121182757.0 CTALK-2019-0024 Groenewegen, M.A.T. Variable stars in the Gaia era: Mira, RR Lyrae, δ and Type-II Cepheids 2017 2017-04-25 NO IAUS 330: Astrometry and Astrophysics in the Gaia sky, Nice (Fra) martin.groenewegen@observatoire.be Invited CTALKINVI