?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Roberto&rft.aulast=Bruni&rft.au=Bruni%2C+Roberto&rft.date=2011&rft.title=Evaluating+the+performance+of+model+transformation+styles+in+Maude&rft.genre=proceeding