David Liu Jun Peng Kincho H. Law Gio Wiederhold Efficient integration of web services with distributed data flow and active mediation. 11-20 2004 conf/ACMicec/2004 ICEC http://doi.acm.org/10.1145/1052220.1052223 db/conf/ACMicec/icec2004.html#LiuPLW04