Barbosa, Roneres Deniz, Alan Ferreira Leite de Lima, Emily Lira Simões, Elilson Gomes de Brito Filho, Milton César Costa Campos, José Maurício da Cunha, Bruno Campos Mantovanelli, Douglas Marcelo Pinheiro Silva, and Fernando Gomes de Souza. 2019. “Spatial Variation of Chemical Attributes in Archaeological Dark Earth under Cocoa Cultivation in Western Amazon”. Bioscience Journal 35 (1). Uberlândia, MG:27-41. https://doi.org/10.14393/BJ-v35n1a2019-37137.