Prevalence of collie eye anomaly in Sweden Wallin-Håkanson, B., Wallin-Håkanson, N. & Hedhammar, Å. (2000) Influence of selective breeding on the prevalence of chorioretinal dysplasia and coloboma in the rough collie in Sweden. Journal of Small Animal Practice 41, 56-59
Role of Actinobacillus species in animal disease Rycroft, A. N. & Garside, L. H. (1999) Actinobacillus species and their role in animal disease. Veterinary Journal 159, 18-36
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