?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Caldarelli%2C+Guido&rft.aufirst=Guido&rft.aulast=Caldarelli&rft.issue=3&rft.volume=37&rft.date=April+2004&rft.title=SIAM+News&rft.atitle=The+mathematics+of+networks%3A+the+structure+of+social+and+biological+systems&rft.genre=article