1. The influence of pen size on toy preference of growing pigs;Apple;Appl. Anim. Behav. Sci.,1992
2. Supply of wood as environmental enrichment material to post-weaning piglets;Barbari;Agron. Res.,2017
3. How studying interactions between animal emotions, cognition, and personality can contribute to improve Farm animal welfare;Boissy,2014
4. Expert opinion regarding environmental enrichment materials for pigs;Bracke;Anim. Welf.,2006
5. Behavioural and hormonal responses of pigs during transport: effect of mixing and duration of journey;Bradshaw;Anim. Sci.,1996