Yun Jin Sung-Hyon Myaeng Mann-Ho Lee Hyo-Jung Oh Myung-Gil Jang Effective Use of Place Information for Event Tracking. 410-422 2005 conf/airs/2005 AIRS http://dx.doi.org/10.1007/11562382_32 db/conf/airs/airs2005.html#JinMLOJ05