- Gregory, J. L. 1954. Nigeria Review of the work by the Entomological Section, Department of Agriculture, 1948-1954: Shot-hole borers of cacao. 6293-296.
- Redfern, D. B., S. C. Gregory, and J. D. Low. 1977. Forest pathology Advisory Services, Northern Research Station. Page 32. Great Britain Forestry Commission, Report on Forest Research 1977. 90 p.
- Redfern, D. B., S. C. Gregory, and J. D. Low. 1979. Forest pathology. Advisory Services. Northern Research Station. Pages 33-34. Great Britain Forestry Commission, Report on Forest Research 1979. 83 p.