?url_ver=Z39.88-2004&rft_id=10.1006%2Fgame.1995.1045&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Sigmund%2C+K.&rft.aulast=Sigmund&rft.aufirst=K.&rft.issue=2&rft.volume=11&rft.date=November+1995&rft.issn=1090-2473&rft.atitle=Introduction&rft.title=Games+and+Economic+Behavior&rft.pages=103-110&rft.genre=article