Horowitz, A. and Dantas, H. da S. 2014. The geochemistry of minor elements in Pernambuco soils. III. Copper in the Zona Litoral-Mata. Pesquisa Agropecuaria Brasileira. 8, 7 (Apr. 2014), 169–176. DOI:https://doi.org/10.1590/S1678-3921.pab1973.v8.17508.