1. World Health Organization, TDR/WP/76.12 (1976).
2. Gutteridge, W. E. Trop. Dis. Bull. 73, 699–705 (1976).
3. Hoare, C. A. in The Trypanosomes of Mammals (Blackwell, Oxford, 1972).
4. Miles, M. A. in Biology of the Kinetoplastida 2 (eds Lumsden, W. H. R. & Evans, D. A.) (Academic, London, (in the press)).
5. Rezende, J. F. M. de Proc. Int. Symp. Belo Horizonte, Minas Gerais, Brazil, 195–205 (Washjngton: Pan American Health Organization Scientific Publication No. 318, 1976).