Gouws, J. J.; Coetzer, J. A.; Howell, P. G. (September 1995). "A comparative microbiological study of clinically healthy eyes and those affected by ophthalmia in cattle and the association of noctuid eye-frequenting moths". Journal of the South African Veterinary Association. 66 (3): 160–169. ISSN1019-9128. PMID8596188.
Gouws, J. J.; Coetzer, J. A.; Howell, P. G. (September 1995). "A comparative microbiological study of clinically healthy eyes and those affected by ophthalmia in cattle and the association of noctuid eye-frequenting moths". Journal of the South African Veterinary Association. 66 (3): 160–169. ISSN1019-9128. PMID8596188.