Horowitz, A. and Dantas, H. da S. 2014. The geochemistry of minor elements in Pernambuco soils. II. Cobalt in the "Zona Litoral-Mata". Pesquisa Agropecuaria Brasileira. 3, 1 (Apr. 2014), 173–182. DOI:https://doi.org/10.1590/S1678-3921.pab1968.v3.17890.