Oliveira, T.S. de et al. 1999. Heavy metals as indicators of parent rocks in a topolithosequence in Triângulo Mineiro, State of Minas Gerais, Brazil. Pesquisa Agropecuaria Brasileira. 34, 8 (Aug. 1999), 1451–1465. DOI:https://doi.org/10.1590/S1678-3921.pab1999.v34.5359.