Extending a DBMS with Spatial Operations.

http://dx.doi.org/10.1007/3-540-54414-3_44 Walid G. Aref Hanan Samet Extending a DBMS with Spatial Operations. 299-318 SSD/1991/P299.pdf 1991 conf/ssd/91 SSD db/conf/ssd/ssd91.html#ArefS91