Monthly Notices of the Royal Astronomical Society Mon.Not.Roy.Astron.Soc. Mon.Not.Roy.Astron.Soc., 2020, 491 (4), pp.5951-5965. ⟨10.1093/mnras/stz3071⟩ Monthly Notices of the Royal Astronomical Society, 491, 5951-5965 Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 491 (4), pp.5951-5965. ⟨10.1093/mnras/stz3071⟩ Monthly Notices of the Royal Astronomical Society, vol 491, iss 4 Monthly Notices of the Royal Astronomical Society, 491, 4, pp. 5951-5965 Keith, M, Lyne, A, Perera, B, Sanidas, S, Stappers, B & et al. 2019, ' A pulsar-based timescale from the International Pulsar Timing Array ', Monthly Notices of the Royal Astronomical Society, vol. 491, no. 4, pp. 5951-5965 . https://doi.org/10.1093/mnras/stz3071