1. Baker,A.J.M. 1974. Heavy metal tolerance and population differentiation in Silene maritima With. PhD thesis (unpublished), University of London.
2. Baker,A.J.M. and Walker,P.L. 1990. Heavy metal tolerance in plants. In: Shaw, A.J. (ed.). Evolutionary Aspects, Ch. 11, pp. 155?177. CRC Press Inc., Boca Raton, Florida.
3. Bradshaw,A.D. 1952. Populations of Agrostis tenuis (London) resistant to lead and zinc poisoning. Nature 169, 1098
4. Bradshaw,A.D. and McNeilly,T. 1981. Evolution and Pollution. Studies in Biology 130. Arnold.
5. De Vos,C.H.R., Schat,H., De Waal,M.A.M., Vooijs,R. and Ernst,W.H.O. 1991. Increased resistance to copper induced damage of the root cell plasmalemma in copper tolerant Silene cucubalus. Physiologia Plantarum, 82, pp.523?528.