Jacob, Jacqueline P., Anthony J. Pescatore, Kenneth E. Anderson, Brigid McCrea, y Daniel P. Shaw. «Impact of Free-Range Poultry Production Systems on Animal Health, Human Health, Productivity, Environment, Food Safety, and Animal Welfare Issues». Council for Agricultural Science and Technology (CAST) (julio 28, 2018). Accedido julio 1, 2026. https://publications.cast-science.org/CAST/article/view/76.