1. Anderson, B.N. and D.W. Ribbons. Abst. An. Meet. Am. Soc. Microbiol. K64 (1980).
2. Anderson, B.N., G.J. Wigmore and D.W. Ribbons. Abst. An. Meet. Am. Soc. Microbiol. 012 (1979).
3. Apirion, D. Nature, 195: 959–961 (1962)
4. Bagdasarian, M., M.M. Bagdasarian, S. Coleman and K.N. Timmis In “Plasmids of Medical, Environmental, and Commercial Importance”, K.N. Timmis and A. Puhler, Eds., Elsevier/North Holland Biomedical Press, Amsterdam, (1979).
5. Barth, P.T. in “Plasmids of Medical, Environmental, and Commercial Importance”. K.N. Timmis and A. Puhler, Eds., Elsevier/ North Holland Biomedical Press, Amsterdam, (1979).