?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Silverberg%2C+G.&rft.aulast=Silverberg&rft.aufirst=G.&rft.issue=3&rft.volume=5&rft.date=1995&rft.issn=1432-1386&rft.atitle=An+evolutionary+model+of+long+term+cyclical+variations+of+catching+up+and+falling+behind&rft.title=Journal+of+Evolutionary+Economics&rft.pages=209-227&rft.genre=article