Junfeng Zhou Zhifeng Bao Tok Wang Ling Xiaofeng Meng MCN: A New Semantics Towards Effective XML Keyword Search. 511-526 2009 DASFAA http://dx.doi.org/10.1007/978-3-642-00887-0_45 conf/dasfaa/2009 db/conf/dasfaa/dasfaa2009.html#ZhouBLM09