?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=O'Hearn&rft.au=O'Hearn%2C+P&rft.aufirst=P&rft.atitle=Separation+Logic&rft.volume=62&rft.date=February+2019&rft.pages=86-95&rft.issn=0001-0782&rft.title=Communications+-+ACM&rft.issue=2&rft.genre=article