Ospina R., Oscar, et al. “Comparison Between Red, Green and Blue Images and Near-Infrared Spectroscopy Methods in the Neutral Detergent Fiber (NDF) Analysis”. Revista De Investigaciones Veterinarias Del Perú, vol. 32, no. 1, Feb. 2021, p. e17498, https://doi.org/10.15381/rivep.v32i1.17498.