Manipulating Spatial Data in Constraint Databases.

http://dx.doi.org/10.1007/3-540-63238-7_27 Alberto Belussi Elisa Bertino Barbara Catania Manipulating Spatial Data in Constraint Databases. 115-141 SSD/1997/P115.pdf 1997 conf/ssd/97 SSD db/conf/ssd/ssd97.html#BelussiBC97