1. Injury levels in gestating sows housed in pens with electronic sow feeders;Anil,2004
2. Comparative study of four housing systems for non-lactating sows;Backus,2001
3. Electronic identification and individual feeding of sows in a very large group;Beckett;Anim. Prod.,1986
4. Group housing of sows—the European experience;Brooks,2003
5. A comparison of the welfare of sows in different housing conditions;Broom;Anim. Sci.,1995