Guillén-García, Carlos Enrique, et al. “Spectral Characteristics of Rice (Oryza Sativa L.) Plantations under Lying down Conditions Caused by Wrinkle Grass (Ischaemum Rugosum Salisb.)”. Geographical Journal of Central America, vol. 1, no. 66, Jan. 2021, pp. 417-38, https://doi.org/10.15359/rgac.66-1.15.