Xiaohui Li, Yan Huang. A Language and a Visual Interface to Specify Complex Spatial Patterns. In Zhi-Hua Zhou, Hang Li, Qiang Yang, editors, Advances in Knowledge Discovery and Data Mining, 11th Pacific-Asia Conference, PAKDD 2007, Nanjing, China, May 22-25, 2007, Proceedings. Volume 4426 of Lecture Notes in Computer Science, pages 656-663, Springer, 2007. [doi]