Rodríguez-Alfaro, Marisol, Catalina Salas-Durán, and Carlos Orozco-Vidaorreta. 2019. “Organic Selenium Supplementation in Layer Hens and Its Transfer to the Egg”. Agronomía Mesoamericana 30 (1):239-53. https://doi.org/10.15517/am.v30i1.32106.