?url_ver=Z39.88-2004&rft_id=10.1109%2FCDC.1986.267522&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Cohen%2C+G.&rft.aulast=Cohen&rft.aufirst=G.&rft.date=December+1986&rft.atitle=Dating+and+counting+events+in+discrete-event+systems&rft.title=IEEE+Xplore&rft.pages=988-993&rft.genre=article