1. Tracheal collapse in the Dog;Amis;Aust. Vet. J.,1974
2. Observations on the upper respiratory tract of the dog and cat;Cook;J. small Anim. Pract.,1964
3. Tracheal collapse in the dog. Review of the literature and report of two new cases;Done;J. small Anim. Pract.,1970
4. Expiratory stenosis of trachea and large bronchi;Herzoo;German. med. Monthly,1960