Haofen Wang Kang Zhang Qiaoling Liu Thanh Tran Yong Yu Q2Semantic: A Lightweight Keyword Interface to Semantic Search. 584-598 2008 ESWC http://dx.doi.org/10.1007/978-3-540-68234-9_43 conf/esws/2008 db/conf/esws/eswc2008.html#WangZLTY08