1. Armstrong, J. I.;Rohrman, G. F.;Beaudreau, G. S. 1985: Delata endotoxin ofBacillus thuringiensis subsp.israelensis. J. Bacteriol.161, 39–46.
2. Bottjer, K. P.;Bone, L. W., 1987: Changes in morphology ofTrichostrongylus colubriformis eggs and juveniles caused byBacillus thuringiensis israelensis. J. Nematol.19, 282–286.
3. Bottjer, K. P.;Bone, L. W.;Gill, S. S., 1985: Nematoda: Susceptibility of the egg toBacillus thuringiensis toxine. Exp. parasitol.60, 239–244.
4. Bradley, D. J.;Webbe, G., 1978: Ecological and habitate methods in Schistosomiasis control. Proc. Int. Conf. Schist.11, 691–709.
5. Cowper, S. G., 1971: Asynopsis of African Bilharziasis. From the liverpool school. Tropical Medicine, London, H. K. Lewis and Co. Ltd.