?url_ver=Z39.88-2004&rft_id=10.1007%2Fs11403-012-0104-7&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Fagiolo%2C+Giorgio&rft.aulast=Fagiolo&rft.aufirst=Giorgio&rft.issn=1860-711X&rft.pages=75-107&rft.date=2013&rft.issue=1&rft.volume=8&rft.title=Journal+of+Economic+Interaction+and+Coordination&rft.atitle=Null+models+of+economic+networks%3A+the+case+of+the+world+trade+web&rft.genre=article