KARANJA, N. N.; NJENGA, M.; MUTUA, G.; LAGERKVIST, C.; KUTTO, E.; OKELLO, J. J. Concentrations of Heavy Metals and Pesticide Residues in Leafy Vegetables and Implications for Peri-urban Farming in Nairobi, Kenya. Journal of Agriculture, Food Systems, and Community Development, Ithaca, NY, USA, v. 3, n. 1, p. 255–267, 2012. DOI: 10.5304/jafscd.2012.031.003. Disponível em: https://foodsystemsjournal.org/index.php/fsj/article/view/152. Acesso em: 3 jul. 2022.