Beniaich, Adnane, et al. “Determination of Vegetation Cover Index under Different Soil Management Systems of Cover Plants by Using an Unmanned Aerial Vehicle With an Onboard Digital Photographic Camera”. Semina: Ciências Agrárias, vol. 40, no. 1, Feb. 2019, pp. 49-66, doi:10.5433/1679-0359.2019v40n1p49.