REFERENCES
- Dada, B.J. O. & Belino, E. D. (1978). Veterinary Record, 103, 311–312.
- Dunn, A. M. (1978). Veterinary Helminthology, 2nd edition. London: Heinemann.
- Soulsby, E.J. L. (1982). Helminths, Arthropods and Protozoa of Domesticated Animals, 7th edition. New York: Bailliere, Tindall.