1. Abebe, W., Asfaw, T., Genete, B., Kassa, B. and Dorchies, P.H., 1997. Comparative studies of external parasites and gastro-intestinal helminths of chickens kept under different management systems in and around Addis Ababa (Ethiopia). Revue de Médicine Vétérinaire, 148, 497–500.
2. Calnek, B.W., 1997. Nematodes and acanthocephalans. In: B.W. Calnek et al., (eds), Diseases of Poultry, 10th edn, (Iowa State University Press, Ames, IA), 815–849.
3. Calnek, B.W., Barnes, H.J., Beard, C.W., Reid, H.W. and Yoder, H.W. (eds), 1991. Diseases of Poultry, 10th edn, (Iowa State University Press), 294–295.
4. Fabiyi, J.P., 1972. Incidence of helminth parasites of the domestic fowl in the Vom Area of Benue-Plateau State, Nigeria. Bulletin of Epizootic Diseases in Africa, 20, 229–234.
5. Hameenda, K.S., 1996. Abstracts, XX World Poultry Congress, New Delhi, India, 2–8 September, vol. IV, 46–48.