Integration of spatial data in vector and raster formats in a geographic information system environment. - Joseph M. Piwowar; Ellsworth F. LeDrew; Douglas J. Dudycha (Int. J. Geogr. Inf. Sci., 1990)

Linking conceptual and simulation models of the Cooum River: collaborative development of a GIS-based DSS for environmental management. - Martin J. Bunch; Douglas J. Dudycha (Comput. Environ. Urban Syst., 2004)