* Jiggins, F. M.; Hurst, G. D. D.; Jiggins, C. D.; Schulenburg, J. H. G. v. D. & Majerus, M. E. N. (2000): The butterfly "Danaus chrysippus" is infected by a male-killing "Spiroplasma" bacterium.
* Jiggins, F. M.; Hurst, G. D. D.; Jiggins, C. D.; Schulenburg, J. H. G. v. D. & Majerus, M. E. N. (2000): The butterfly "Danaus chrysippus" is infected by a male-killing "Spiroplasma" bacterium.