1. Costa-Cabral, M.C. and Burges, S.J., 1994. Digital elevation model networks (DEMON): a model of flow over hillslopes for computations of contributing and dispersal areas. Water Resources Research, 30(6): 1681–1692.
2. Fairchild, J. and Leymarie, P., 1991. Drainage networks from grid digital elevation models. Water Resources Research, 22(5): 709–717.
3. Freeman, T.G., 1991. Calculating catchment area with divergent flow based on a regular grid. Computers and Geosciences, 17(3): 413–422.
4. Garbrecht, J. and Martz, L.W., 1995. TOPAZ: an automated digital landscape analysis tool for topographic evaluation, drainage identification, watershed segmentation and subcatchment parameterization; overview. USDA, Agricultural Research Service, National Agricultural Water Quality Laboratory, Durant, Oklahoma, NAWQL 95–1, 17pp.
5. Jenson, S.K. and Domingue, J.O., 1988. Extracting topographic structure from digital elevation data for geographic information systems analysis. Photogrammetric Engineering and Remote Sensing, 54(11): 1593–1600.