?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=van+Ewijk%2C+S&rft.aufirst=S&rft.aulast=van+Ewijk&rft.date=6+June+2017&rft.atitle=Global+life+cycle+paper+flows%2C+recycling+metrics+and+material+efficiency&rft.issn=1530-9290&rft.title=Journal+of+Industrial+Ecology&rft.genre=article