E. Malavolta, J. L. Favarin, M. Malavolta, C. P. Cabral, R. Heinrichs, and J. S. M. Silveira, “Nutrients repartition in the coffee branches, leaves and flowers”, PAB, vol. 37, no. 7, pp. 1017–1022, Jul. 2002, doi: 10.1590/S1678-3921.pab2002.v37.6432.