1. An unusual lateral tracheal collapse in a dog;Binnington;Canadian Veterinary Journal,1977
2. Surgically treatable upper respiratory disorders;Bjorling;Veterinary Clinics of North America: Small Animal Practice,2000
3. Surgical treatment of tracheal collapse in dogs: 90 cases (1983-1993);Buback;Journal of the American Veterinary Medical Association,1996
4. Antitussive properties of butorphanol;Cavanagh;Archives Internationales de Pharmacodynamie et de Thérapie,1976
5. Hypoplasia of the trachea in dogs: 103 cases (1974-1990).;Coyne;Journal of the American Veterinary Medical Association,1992