1. Foreign body obstruction of the small intestine of a foal;Baker;Vet. Rec.,1974
2. Duodenal impaction in a horse;Bohanon;J. Am. vet. med. Ass.,1988
3. Duodenal phytobezoar with secondary perforating gastric ulcer in an adult horse;Bridges;Equine Pract.,1993
4. Grass sickness - the same old suspects but still no convictions!;Collier;Equine vet. J.,2000