| | + | * Meuller E, Moore J. N, (2008) Classification and Pathophysiology of Colic, Gastrointestinal Emergencies and Other Causes of Colic, in Equine Emergencies- Treatments and Procedures, 3rd Edition, Eds Orsini J. A, Divers T.J, Saunders Elsevier, pp 101-102 |
| | + | * Reed S.M, Bayly W.M, Sellon D.C (2010) Diagnostic Evaluation, Disorders of the Gastrointestinal System, Equine Internal Medicine, 3rd Edition, Saunders Elsevier, pp 783 - 784 |