1. Buchner, P. Endosymbiosis of Animals with Plant Microorganisms. (New York: Interscience Publishers, 1965).
2. Ishikawa, H. Insect Symbiosis: an Introduction. P. 1–21. In Bourtzis, K. & Miller, T. A. Insect Symbiosis. (Boca Raton: CRC Press, 2003).
3. Ruby, E., Henderson, B. & McFall-Ngai, M. We get by with a little help from our (little) friends. Science. 303, 1305–1307 (2004).
4. Dasch, G., Weiss, E., Chang, K. Genus VIII. Rickettsiella Philip 1956. Bergy’s Manual of Systematic Bacteriology. 4:811–833 (New York: Springer, 2010).
5. Douglas, A. E. Mycetocyte symbiosis in insects. Biol. Rev. Camb. Phil. Soc. 64, 409–434 (1989).