1. Official Methods of Analysis;A.O.A.C,1965
2. The sheep nasal fly (Oestrus ovis L.);Bedford;J. Dept. Agric., Union S. Af.,1925
3. The seasonal incidence of helminth parasites and of Oestrus ovis in Karakul sheep in the Kalahari region of south west Africa/Namibia;Biggs;Onderstepoort J. Vet. Res.,1982
4. Influence of constant and variable temperatures on pupal development of the sheep bot fly (Oestrus ovis);Breev;Folia Parasitologia (Praha),1980
5. Further observations on the life cycle and incidence of the sheep bot, Oestrus ovis, in New Mexico and Texas;Cobbett;Am. J. Vet. Res.,1941