Lian, J, Thomas, D, Maraston, C, Beers, T C, Bidin, C M, Fernández-Trincado, J G, García-Hernández, D A, Lane, R R, Munoz, R R, Nitschelm, C, Roman-Lopes, A & Zamora, O 2020, ' The age-chemical abundance structure of the Galactic disc II. α-dichotomy and thick disc formation ', Monthly Notices of the Royal Astronomical Society, vol. 497, no. 2, pp. 2371-2384 . https://doi.org/10.1093/mnras/staa2078