Evaluation of different methods for delineation of wetlands in the Limpopo river basin using Landsat ETM+ and SRTM data - Kulawardhana, R. W.; Thenkabail, Prasad S.; Masiyandima, Mutsa; Biradar, Chandrashekhar M.; Vithanage, Jagath; Finlayson, C. Max; Gunasinghe, Sarath; Alankara, R. (2006)