Long Zhang, Ying Li, Fangyan Rao, Xiulan Yu, Ying Chen, Dong Liu. An Approach to Enabling Spatial OLAP by Aggregating on Spatial Hierarchy. In Yahiko Kambayashi, Mukesh K. Mohania, Wolfram Wöß, editors, Data Warehousing and Knowledge Discovery, 5th International Conference, DaWaK 2003, Prague, Czech Republic, September 3-5,2003, Proceedings. Volume 2737 of Lecture Notes in Computer Science, pages 35-44, Springer, 2003. [doi]