Pérez-Molina, Junior Pastor, Carola Scholz, Roy Pérez-Salazar, Carolina Alfaro-Chinchilla, Ana Abarca Méndez, Leandro Araya Leitón, Jeslyn Carranza Chaves, et al. 2021. “Spatial Variation of Physicochemical Parameters in a Constructed Wetland for Wastewater Treatment: An Example of the Use of the R Programming Language ”. UNED Research Journal 13 (1):e3294. https://doi.org/10.22458/urj.v13i1.3294.