1. Rooney N, Sargan DR (2009) Pedigree dog breeding in the UK: a major welfare concern. RSPCA. 1–76 p.
2. Disorders in pedigree dogs: Assembling the evidence;FW Nicholas;The Veterinary Journal,2010
3. Update on eye disorders among purebred dogs;R Whitley;Veterinary Medicine,1995
4. Conjunctivitis. Differential diagnosis and treatment;C Martin;Vet Clin North Am Small Anim Pract,1973