db/conf/coopis/MengYL99.html Weiyi Meng Clement T. Yu King-Lup Liu Detection of Heterogeneities in a Multiple Text Database Environment. 22-33 DiSC2_1/out/papers/coopis/03840022.pdf 1999 conf/coopis/1999 CoopIS http://computer.org/proceedings/coopis/0384/03840022abs.htm db/conf/coopis/coopis99.html#MengYL99