?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.ssci.2011.11.015&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A.M.&rft.aulast=Shariff&rft.au=Shariff%2C+A.M.&rft.title=Safety+Science&rft.date=2012&rft.volume=50&rft.issn=09257535&rft.issue=4&rft.atitle=Using+process+stream+index+(PSI)+to+assess+inherent+safety+level+during+preliminary+design+stage&rft.pages=1098-1103&rft.genre=article