?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Gubanova%2C+Tatiana&rft.aulast=Gubanova&rft.aufirst=Tatiana&rft.date=2005&rft.title=Assessing+Price+Forecasting+Models+for+Organic+Commodities+&rft.genre=proceeding