Jordi Delgado Josep M. Pujol Ramon Sangüesa Emergence of coordination in scale-free networks. 131-138 2003 1 Web Intelligence and Agent Systems 2 http://iospress.metapress.com/openurl.asp?genre=article&issn=1570-1263&volume=1&issue=2&spage=131 db/journals/wias/wias1.html#DelgadoPS03