Sanmiguel-Plazas, Rosa, Claudia Rodríguez-Niño, and Wilson Aguirre-Pedreros. “Humic Substances Decrease the Stress in Layer Hens During the Post Molting Phase”. Ciencia y Agricultura 12, no. 1 (January 19, 2015): 57-64. Accessed May 16, 2021. https://revistas.uptc.edu.co/index.php/ciencia_agricultura/article/view/4121.