Scollo, Annalisa, Giulio Cozzi, Valerio Bondesan, és Flaviana Gottardo. 2010. „Improvement of Animal Welfare in Lactating Sows Reared Outdoor in Mediterranean Area”. Acta Agraria Kaposváriensis 14 (2): 229-35. https://journal.uni-mate.hu/index.php/aak/article/view/2008.