1. Georg L, In Plasmids: Current Research and Future Trends Book, Caister Academic Press, University of Bayreuth, Germany (2008) p. 264.
2. Chakrabarty PK, Mahadevan A, Raj S, Meshram, MK & Gabriel DW, Can. J. Microbiology, 41 (1995) 740.
3. Vauterin L & Swings J, J Indust Microbiol Biotech, 19 (1997) 77.
4. Kado CI & Liu ST, J. Bacteriol., 145 (1981) 1365.
5. Gabriel DW & DeFeyter R, In Molecular Plant Pathology- A Practical Approach, Volume I, (eds. Gurr, S. J., Mcpherson, M. J. and Bowles, D. J.), Oxford University Press, New York, (1992), 51.