?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Berro&rft.aufirst=Alain&rft.date=2015&rft.title=Graph-Based+ETL+Processes+For+Warehousing+Statistical+Open+Data&rft.genre=proceeding