Curtis, Stanley E., Rodney B. Baker, Mark J. Estienne, P. Brendan Lynch, John J. McGlone, y Bjarne K. Pedersen. «Scientific Assessment of the Welfare of Dry Sows Kept in Individual Accommodations». Council for Agricultural Science and Technology (CAST) (marzo 5, 2009). Accedido julio 1, 2026. https://publications.cast-science.org/CAST/article/view/139.