The life cycles of Be viscous decretion discs: fundamental disc parameters of 54 SMC Be stars - Rimulo, L. R; Carciofi, Alex Cavaliéri; Vieira, R. G; Rivinius, Thomas; Faes, Daniel Moser; Figueiredo, A. L; Bjorkman, J E; Georgy, C; Ghoreyshi, M. R; Soszynski, I (Monthly Notices of the Royal Astronomical Society, 2018)