Horowttz, Arão, and Humberto da Silveira Dantas. 2014. “The Geochemistry of Minor Elements in Pernambuco Soils. IV. Zinc in the ‘Zona Litoral-Mata’”. Pesquisa Agropecuaria Brasileira 11 (12):27-35. https://doi.org/10.1590/S1678-3921.pab1976.v11.16916.