1. Adams, J.B., 1991. The Distribution of Estuarine Macrophytes in Relation to Freshwater in a Number of Eastern Cape Estuaries. MSc thesis. Department of Botany, University of Port Elizabeth, South Africa.
2. The distribution of estuarine macrophytes in relation to freshwater;Adams;Bot. Mar.,1992
3. Addo-Bediako, A., 1998. Community Structure, Abundance and Diversity of Fish in the Swartkops Estuary Salt Marsh Fringes. MSc thesis. Department of Zoology, University of Port Elizabeth, Port Elizabeth, South Africa, unpublished.
4. Bentho-pelagic switching in a coastal subtropical lagoon;Almunia;Estuar. Coast. Shelf Sci.,1999
5. The Diatoms of the Sundays and Great Fish Rivers in the Eastern Cape Province of South Africa;Archibald,1983