Reinecke, A., and S. Reinecke. “The Protection of Biological Diversity by Using the Variation in Sensitivity of Species for Toxic Substances”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt;, Vol. 22, no. 4, Sept. 2003, pp. 94-04, doi:10.4102/satnt.v22i4.217.