Gabriel M. Kuper, Sridhar Ramaswamy, Kyuseok Shim, Jianwen Su. A Constraint-Based Spatial Extension to SQL. In Robert Laurini, Kia Makki, Niki Pissinou, editors, ACM-GIS 98, Proceedings of the 6th international symposium on Advances in Geographic Information Systems, November 6-7, 1998, Washington, DC, USA. pages 112-117, ACM, 1998. [doi]
Abstract is missing.