Risso, Wagner Ezequiel, et al. “Organic Production in Corn: Impact of Fertilization With Landfill Leachate in Chemical Composition, Productivity and Concentration of Metals in Grain”. Semina: Ciências Agrárias, vol. 36, no. 5, Oct. 2015, pp. 3101-12, doi:10.5433/1679-0359.2015v36n5p3101.