Baldotto, Marihus Altoé, et al. “Field Corn Yield in Response to Humic Acids Application in the Absence or Presence of Liming and Mineral Fertilization”. Semina: Ciências Agrárias, vol. 40, no. 6Supl2, Sept. 2019, pp. 3299-04, doi:10.5433/1679-0359.2019v40n6Supl2p3299.