C. A. Redman, P. G. Coen, L. Matthews, R. M. Lewis, W. S. Dingwall, J. D. Foster, M. E. Chase-Topping, N. Hunter and M. E. J. Woolhouse. (2002). Comparative Epidemiology of Scrapie Outbreaks in Individual Sheep Flocks. Epidemiology and Infection, 128(3), 513–521.
doi:10.2307/3864753
