1. Anon 2003 Danish Veterinary Council. Statements concerning shoulder ulcerations in sows Ministry of Food, Agriculture and Fisheries, Danish Veterinary and Food Administration 1 2
2. Anon 2007 Pressure Ulcer Stages National Pressure Ulcer Advisory Panel 1 2
3. Danish Veterinary Council. Supplementary statements concerning shoulder ulcerations in sows;Anon;Dansk Veterinaertidsskrift,2008
4. Pressure-related deep tissue injury under intact skin and the current pressure ulcer staging systems;Ankrom;Advances in Skin and Wound Care,2005