1. Ashton, P. and D. S. Mitchell. 1989. Aquatic plants: Patterns and modes of invasion, attributes of invading species and assessment of control programmes. In: Drake, J. A. et al. (eds.) Biological Invasions: A Global Perspective. John Wiley, Chester.
2. Baker, H. G. 1955. Self-compatibility and establishment after “long-distance” dispersal. Evolution 9: 347–349.
3. —. 1965. Characteristics and modes of origins weeds, pp. 141–172. In H. G. Baker and G. L. Stebbins (eds.). The Genetics of Colonizing Species. Academic Press, London.
4. —. 1974. The evolution of weeds. Ann. Rev. Ecol. Syst. 5:1–24.
5. Baker, H. G., and G. L. Stebbins (eds.) 1965. The Genetics of Colonizing Species. Academic Press, London.