Underwood, W., McClary, D. and Kube, J. (1995) “The ‘Bovine Perfect Sleeper’ or use of shredded rubber filled polyester mattresses to prevent injury to dairy cattle housed in tie stalls”, The Bovine Practitioner, 1995(29), pp. 143–148. doi: 10.21423/bovine-vol1995no29p143-148.