1. Pálsson, P.A. In: Slow virus diseases of animals and man (Ed. R.H. Kimberlin), North Holland Publishing Co., Amsterdam, 1976, pp. 17–43.
2. Sigurðsson, B., Pálsson, P.A. and Tryggvadóttir, A. J. Infect. Dis. 93: 166–175, 1953.
3. Sigurðardóttir, B. and Thormar, H. J. Infect. Dis. 114: 55–60, 1964.
4. Guðnadóttir, M. and Pálsson, P.A. J. Infect. Dis. 115: 217–225, 1965.
5. Sigurðsson, B. Brit. Vet. J. 110: 341–354, 1954.