Hoppes, S., Gray, P. L., Payne, S., Shivaprasad, H., & Tizard, I. (2010). The Isolation, Pathogenesis, Diagnosis, Transmission, and Control of Avian Bornavirus and Proventricular Dilatation Disease. Vet Clin North Am Exot Anim Pract.

Hoppes, Sharman, Patricia L. Gray, Susan Payne, H.L Shivaprasad, and Ian Tizard. "The Isolation, Pathogenesis, Diagnosis, Transmission, and Control of Avian Bornavirus and Proventricular Dilatation Disease." Vet Clin North Am Exot Anim Pract 2010.

Hoppes, Sharman, et al. "The Isolation, Pathogenesis, Diagnosis, Transmission, and Control of Avian Bornavirus and Proventricular Dilatation Disease." Vet Clin North Am Exot Anim Pract 2010.