Venancio, Luan Peroni, et al. “Mapping of Corn Phenological Stages Using NDVI from OLI and MODIS Sensors”. Semina: Ciências Agrárias, vol. 41, no. 5, June 2020, pp. 1517-34, doi:10.5433/1679-0359.2020v41n5p1517.