1. McGowan, J.P., Scrapie in sheep, Scot. J. Agricult. 5: 365 (1922).
2. Gaiger, S.H., Scrapie, J. Comp. Path. 37: 259 (1924).
3. Cuille, J. and P.L. Chelle, La maladie dite tremblante du mouton est-elle inoculable?, C. R. Acad. Sci. (Paris) 203: 1552 (1936).
4. Chandler, R.L., Encephalopathy in mice produced by inoculation with scrapie brain material, Lancet i: 1378 (1961).
5. Kimberlin, R.H. and C.A. Walker, Characteristics of a short incubation model of scrapie in the golden hamster, J. Gen. Virol. 34: 295 (1977).