Richardson, Naomi. Rhodes University; 2008. A preliminary investigation into the use of biomarkers and a fish community index to assess estuarine health in selected Eastern Cape estuaries.

Richardson, Naomi, Whitfield, Alan K, Paterson, Angus W. The influence of selected environmental parameters on the distribution of the dominant demersal fishes in the Kariega Estuary channel, South Africa. 2006.