Silveira, J. S. M., Sant’Anna, R., Rena, A. B., & Garcia, R. (2014). Nitrogen translocation as a function of the proportion of nitrate and ammonium. Pesquisa Agropecuaria Brasileira, 20(1), 15–23. https://doi.org/10.1590/S1678-3921.pab1985.v20.14962