Liu, G, Chuine, I, Denéchère, R, Jean, F, Dufrêne, E, Vincent, G, Berveiller, D & Delpierre, N 2021, ' Higher sample sizes and observer inter-calibration are needed for reliable scoring of leaf phenology in trees ', Journal of Ecology, vol. 109, no. 6, pp. 2461-2474 . https://doi.org/10.1111/1365-2745.13656 Journal of Ecology Journal of Ecology, Wiley, 2021, ⟨10.1111/1365-2745.13656⟩