?url_ver=Z39.88-2004&rft_id=10.1016%2F0304-3975(93)90153-K&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Pierpaolo&rft.au=Degano%2C+Pierpaolo&rft.aulast=Degano&rft.date=1993&rft.issue=1&rft.volume=114&rft.title=Theoretical+Computer+Science&rft.atitle=Universal+Axioms+for+Bisimulations&rft.issn=0304-3975&rft.pages=63-91&rft.genre=article