1. An analysis of transformations;Box;J. R. Statist. Soc. B,1964
2. White Paper on a National Water Policy for South Africa,1997
3. Towards the incorporation of magnitude–frequency concepts into the building block methodology used for quantifying ecological flow requirements of South African rivers;Hughes;Water SA,1999
4. Providing hydrological information and data analysis tools for the determination of ecological instream flow requirements for South African rivers;Hughes;J. Hydrol.,2001
5. Hughes, D.A., Münster, F., 2000. Hydrological information and techniques to support the determination of the water quantity component of the ecological reserve for rivers. Report to the Water Research Commission by the Institute for Water Research, Rhodes University. WRC Report No. 867/3/2000, Pretoria, South Africa.