Yutu Liu Anne H. H. Ngu Liangzhao Zeng QoS computation and policing in dynamic web service selection. 66-73 2004 conf/www/2004at WWW (Alternate Track Papers & Posters) http://doi.acm.org/10.1145/1013367.1013379 db/conf/www/www2004at.html#LiuNZ04