1. Ahvonen, P., E. Jansson & K. Aho: Marked cross-agglutination between Brucellae and a subtype of Yersinia enterocolitica. Acta path, microbiol. scand. 1969, 75, 291–295.
2. Baughn, R. E. & B. A. Freeman: Antigenic structure of Brucella suis spheroplasts. J. Bact. 1966, 92, 1298–1303.
3. Braun, W. & A. Bonesiell: Independent variation of characteristics in Brucella abortus variants and their detection. Amer. J. vet. Res. 1947, 8, 386–390.
4. Clausen, J.: Immunochemical Techniques for the Identification and Estimation of Macromolecules. North-Holland Publishing Company, Amsterdam 1969, 531.
5. Crowle, A. J.: Immunodiffusion. Academic Press, New York and London 1961, 306.