Padilla Ramírez José Saúl, et al. “Variance Between and Within the Index of Repeatability of Quantitative Characteristics of Guava Fruit”. Revista Mexicana De Ciencias Agrícolas, vol. 5, no. 8, Jan. 2018, pp. 1423-32, https://doi.org/10.29312/remexca.v5i8.820.