Yu, Wang, et al. “Effects of Inductive Methods on Dunging Behavior of Weaning Pigs in Slatted Floor Pens”. International Journal of Agricultural and Biological Engineering, vol. 9, no. 4, July 2016, pp. 192-8, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/2560.