?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Tschaikowski&rft.aufirst=Max&rft.au=Tschaikowski%2C+Max&rft.date=September+2011&rft.title=Refined+theory+of+packages&rft.genre=proceeding