H. C. Bazame, F. A. Pinto, D. S. Queiroz, D. M. de Queiroz, and D. Althoff, “Spectral sensors prove beneficial in determining nitrogen fertilizer needs of <i>Urochloa brizantha</i> cv. Xaraés grass in Brazil”, Trop. grassl.-Forrajes trop., vol. 8, no. 2, pp. 60–71, May 2020.