Pereira Reis, Thiago Henrique, et al. “Nutritional Status and Foliar Fractions of P in Coffee Plants According to Phosphate Fertilization”. Pesquisa Agropecuaria Brasileira, vol. 48, no. 7, Oct. 2013, pp. 765-73, https://doi.org/10.1590/S1678-3921.pab2013.v48.13887.