?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=John&rft.aulast=Wynstra&rft.au=Wynstra%2C+John&rft.title=Xerxes+-+A+Better+Front-End+for+Metalib&rft.date=2011&rft.genre=proceeding