Galicia-Villanueva, Silvia, et al. “Experimental Plantation of Nopal for Evaluation of Fertilization and Mucilage Extraction Systems”. Revista Mexicana De Ciencias Agrícolas, vol. 8, no. 5, Aug. 2017, pp. 1087-99, https://doi.org/10.29312/remexca.v8i5.110.