1. Alton, G. G., Jones, L. M. & Pietz, D. E. (1975). Laboratory Techniques in Brucellosis, 2nd edn, WHO, Geneva, pp. 64–84.
2. Bouters, R., Dekeyser, J., Vandeplassche, M., Van Aert, A., Brone, E. & Bronte, P. (1973).British Veterinary Journal,129, 52–57.
3. Cedro, V. C. F., Asole, H. O. & Farti, de Meroldo, L. R. A. (1967). Brucellosis in bulls: agglutination titres and bacteriological diagnosis. WHO.
4. CIAT (1975). CIAT Informe Anual, Sanidad Animal. Cali Colombia, pp. A33–A35.
5. Clark, B. L., Parsonson, I. M., White, M. B., Banfield, J. C. & Young, J. S. (1974).Australian Veterinary Journal,50, 424–426.