López-Salazar Rubén; González-Cervantes Guillermo; Vázquez-Alvarado Rigoberto Eustacio; Olivares-Sáenz Emilio; VIDALES-CONTRERAS, Juan Antonio; CARRANZA DE LA ROSA, Roberto; ORTEGA-ESCOBAR, Manuel. Humic and fulvic acid extraction method and characterization by infrared spectrophotometry. Revista Mexicana de Ciencias Agrícolas, México, ME, n. 8, p. 1397–1407, 2018. DOI: 10.29312/remexca.v0i8.1094. Disponível em: https://cienciasagricolas.inifap.gob.mx/index.php/agricolas/article/view/1094. Acesso em: 31 may. 2026.