1. Newton, B. A., in Trypanosomiasis and Leishmaniasis with Special Reference Chagas' Disease, CIBA Foundation Symp. No. 20, 285–301 (new series)(Elsevier, Amsterdam, 1974).
2. Williamson, J., Trop. Dis. Bull., 73, 531–542 (1976).
3. Vickerman, K., Nature, 208, 762–766 (1965).
4. Bowman, I. B. R., and Flynn, I. W., in Biology of the Kinetoplastida (edit. by Lumsden, W. H. R., and Evans, D. A.), 1, 435–476 (Academic, New York, 1976).
5. Fulton, J. D., and Spooner, D. F., Expl Parasitol., 8, 137–162 (1959).