?url_ver=Z39.88-2004&rft_id=10.1103%2FPhysRevE.57.R6241&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Alessandro&rft.au=Chessa%2C+Alessandro&rft.aulast=Chessa&rft.pages=R6241-R6244&rft.issn=1539-3755&rft.title=Physical+Review+E&rft.volume=57&rft.date=June+1998&rft.atitle=Mean-field+behavior+of+the+sandpile+model+below+the+upper+critical+dimension&rft.genre=article