Michael D. Lieberman Jagan Sankaranarayanan Hanan Samet Jon Sperling Augmenting spatio-textual search with an infectious disease ontology. 266-269 2008 ICDE Workshops http://dx.doi.org/10.1109/ICDEW.2008.4498330 conf/icde/2008w db/conf/icde/icdew2008.html#LiebermanSSS08