An extended relational database for remotely sensed image data management within GIS. - Hazem M. Raafat; Qinghan Xiao; David A. Gauthier (IEEE Trans. Geosci. Remote. Sens., 1991)

Relational Spatial Topologies for Historical Geographical Information. - Hazem M. Raafat; Zhongsen Yang; David A. Gauthier (Int. J. Geogr. Inf. Sci., 1994)