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\bibitem{Urbina_etal2021} Urbina, I., Grau, O., Sardans, J., Margalef, O., Peguero, G., Asensio, D., et al. (2021). High foliar K and P resorption efficiencies in old-growth tropical forests growing on nutrient-poor soils. \textit{Ecology and Evolution}, \textit{11}(13), 8969--8982.

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