Antti Ukkonen Carlos Castillo Debora Donato Aristides Gionis Searching the wikipedia with contextual information. 1351-1352 2008 CIKM http://doi.acm.org/10.1145/1458082.1458274 conf/cikm/2008 db/conf/cikm/cikm2008.html#UkkonenCDG08