1. Ansa-Asare OD. Do dissolved oxygen cycles have diagnostic value for assessing pollution status in lakes? Ph.D Thesis, University of Aberdeen, Aberdeen. 1998:75–208.
2. A geography of Ghana;Boateng,1970
3. Surface water quality modelling;Chapra,1997
4. Edwards RW, Duffield AN, Marshall EJ. Estimation of community metabolism of drainage channels from oxygen distribution. Proc. EWRS 5th Symp. on Aquatic Weeds, 1978:295–302.
5. Ecosystem and macrophyte primary production of the Fort River, Massachussetts;Fisher;Hydrobiologia,1976