?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.tcs.2008.01.049&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Castagna&rft.aufirst=Giuseppe&rft.au=Castagna%2C+Giuseppe&rft.issn=0304-3975&rft.issue=1-3&rft.pages=217-242&rft.volume=398&rft.date=2008&rft.title=Theoretical+Computer+Science&rft.atitle=Semantic+subtyping+for+the+pi-calculus&rft.genre=article