?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Guido&rft.aulast=Caldarelli&rft.au=Caldarelli%2C+Guido&rft.isbn=978-0-19-921151-7&rft.tpages=323&rft.btitle=Scale-free+networks+%3A+complex+webs+in+nature+and+technology&rft.date=2007&rft.genre=book