Hyunyoung Kil Seog-Chan Oh Ergin Elmacioglu Wonhong Nam Dongwon Lee Graph Theoretic Topological Analysis of Web Service Networks. 321-343 2009 12 World Wide Web 3 http://dx.doi.org/10.1007/s11280-009-0064-6 db/journals/www/www12.html#KilOENL09